1ac27a0ecSDave Kleikamp /* 2617ba13bSMingming Cao * linux/fs/ext4/super.c 3ac27a0ecSDave Kleikamp * 4ac27a0ecSDave Kleikamp * Copyright (C) 1992, 1993, 1994, 1995 5ac27a0ecSDave Kleikamp * Remy Card (card@masi.ibp.fr) 6ac27a0ecSDave Kleikamp * Laboratoire MASI - Institut Blaise Pascal 7ac27a0ecSDave Kleikamp * Universite Pierre et Marie Curie (Paris VI) 8ac27a0ecSDave Kleikamp * 9ac27a0ecSDave Kleikamp * from 10ac27a0ecSDave Kleikamp * 11ac27a0ecSDave Kleikamp * linux/fs/minix/inode.c 12ac27a0ecSDave Kleikamp * 13ac27a0ecSDave Kleikamp * Copyright (C) 1991, 1992 Linus Torvalds 14ac27a0ecSDave Kleikamp * 15ac27a0ecSDave Kleikamp * Big-endian to little-endian byte-swapping/bitmaps by 16ac27a0ecSDave Kleikamp * David S. Miller (davem@caip.rutgers.edu), 1995 17ac27a0ecSDave Kleikamp */ 18ac27a0ecSDave Kleikamp 19ac27a0ecSDave Kleikamp #include <linux/module.h> 20ac27a0ecSDave Kleikamp #include <linux/string.h> 21ac27a0ecSDave Kleikamp #include <linux/fs.h> 22ac27a0ecSDave Kleikamp #include <linux/time.h> 23c5ca7c76STheodore Ts'o #include <linux/vmalloc.h> 24dab291afSMingming Cao #include <linux/jbd2.h> 25ac27a0ecSDave Kleikamp #include <linux/slab.h> 26ac27a0ecSDave Kleikamp #include <linux/init.h> 27ac27a0ecSDave Kleikamp #include <linux/blkdev.h> 28ac27a0ecSDave Kleikamp #include <linux/parser.h> 29ac27a0ecSDave Kleikamp #include <linux/buffer_head.h> 30a5694255SChristoph Hellwig #include <linux/exportfs.h> 31ac27a0ecSDave Kleikamp #include <linux/vfs.h> 32ac27a0ecSDave Kleikamp #include <linux/random.h> 33ac27a0ecSDave Kleikamp #include <linux/mount.h> 34ac27a0ecSDave Kleikamp #include <linux/namei.h> 35ac27a0ecSDave Kleikamp #include <linux/quotaops.h> 36ac27a0ecSDave Kleikamp #include <linux/seq_file.h> 379f6200bbSTheodore Ts'o #include <linux/proc_fs.h> 383197ebdbSTheodore Ts'o #include <linux/ctype.h> 391330593eSVignesh Babu #include <linux/log2.h> 40717d50e4SAndreas Dilger #include <linux/crc16.h> 417abc52c2SDan Magenheimer #include <linux/cleancache.h> 42ac27a0ecSDave Kleikamp #include <asm/uaccess.h> 43ac27a0ecSDave Kleikamp 44bfff6873SLukas Czerner #include <linux/kthread.h> 45bfff6873SLukas Czerner #include <linux/freezer.h> 46bfff6873SLukas Czerner 473dcf5451SChristoph Hellwig #include "ext4.h" 484a092d73STheodore Ts'o #include "ext4_extents.h" /* Needed for trace points definition */ 493dcf5451SChristoph Hellwig #include "ext4_jbd2.h" 50ac27a0ecSDave Kleikamp #include "xattr.h" 51ac27a0ecSDave Kleikamp #include "acl.h" 523661d286STheodore Ts'o #include "mballoc.h" 53ac27a0ecSDave Kleikamp 549bffad1eSTheodore Ts'o #define CREATE_TRACE_POINTS 559bffad1eSTheodore Ts'o #include <trace/events/ext4.h> 569bffad1eSTheodore Ts'o 571f109d5aSTheodore Ts'o static struct proc_dir_entry *ext4_proc_root; 583197ebdbSTheodore Ts'o static struct kset *ext4_kset; 590b75a840SLukas Czerner static struct ext4_lazy_init *ext4_li_info; 600b75a840SLukas Czerner static struct mutex ext4_li_mtx; 610b75a840SLukas Czerner static struct ext4_features *ext4_feat; 629f6200bbSTheodore Ts'o 63617ba13bSMingming Cao static int ext4_load_journal(struct super_block *, struct ext4_super_block *, 64ac27a0ecSDave Kleikamp unsigned long journal_devnum); 652adf6da8STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root); 66e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync); 67617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 68617ba13bSMingming Cao struct ext4_super_block *es); 69617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 70617ba13bSMingming Cao struct ext4_super_block *es); 71617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait); 7206a407f1SDmitry Monakhov static int ext4_sync_fs_nojournal(struct super_block *sb, int wait); 73617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data); 74617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf); 75c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb); 76c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb); 77152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 78152a0836SAl Viro const char *dev_name, void *data); 792035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb); 802035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb); 81d39195c3SAmir Goldstein static int ext4_feature_set_ok(struct super_block *sb, int readonly); 82bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void); 83bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb); 848f1f7453SEric Sandeen static void ext4_clear_request_list(void); 8527dd4385SLukas Czerner static int ext4_reserve_clusters(struct ext4_sb_info *, ext4_fsblk_t); 86ac27a0ecSDave Kleikamp 872035e776STheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 882035e776STheodore Ts'o static struct file_system_type ext2_fs_type = { 892035e776STheodore Ts'o .owner = THIS_MODULE, 902035e776STheodore Ts'o .name = "ext2", 912035e776STheodore Ts'o .mount = ext4_mount, 922035e776STheodore Ts'o .kill_sb = kill_block_super, 932035e776STheodore Ts'o .fs_flags = FS_REQUIRES_DEV, 942035e776STheodore Ts'o }; 957f78e035SEric W. Biederman MODULE_ALIAS_FS("ext2"); 96fa7614ddSEric W. Biederman MODULE_ALIAS("ext2"); 972035e776STheodore Ts'o #define IS_EXT2_SB(sb) ((sb)->s_bdev->bd_holder == &ext2_fs_type) 982035e776STheodore Ts'o #else 992035e776STheodore Ts'o #define IS_EXT2_SB(sb) (0) 1002035e776STheodore Ts'o #endif 1012035e776STheodore Ts'o 1022035e776STheodore Ts'o 103ba69f9abSJan Kara #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 104ba69f9abSJan Kara static struct file_system_type ext3_fs_type = { 105ba69f9abSJan Kara .owner = THIS_MODULE, 106ba69f9abSJan Kara .name = "ext3", 107152a0836SAl Viro .mount = ext4_mount, 108ba69f9abSJan Kara .kill_sb = kill_block_super, 109ba69f9abSJan Kara .fs_flags = FS_REQUIRES_DEV, 110ba69f9abSJan Kara }; 1117f78e035SEric W. Biederman MODULE_ALIAS_FS("ext3"); 112fa7614ddSEric W. Biederman MODULE_ALIAS("ext3"); 113ba69f9abSJan Kara #define IS_EXT3_SB(sb) ((sb)->s_bdev->bd_holder == &ext3_fs_type) 114ba69f9abSJan Kara #else 115ba69f9abSJan Kara #define IS_EXT3_SB(sb) (0) 116ba69f9abSJan Kara #endif 117bd81d8eeSLaurent Vivier 118d25425f8SDarrick J. Wong static int ext4_verify_csum_type(struct super_block *sb, 119d25425f8SDarrick J. Wong struct ext4_super_block *es) 120d25425f8SDarrick J. Wong { 121d25425f8SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 122d25425f8SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 123d25425f8SDarrick J. Wong return 1; 124d25425f8SDarrick J. Wong 125d25425f8SDarrick J. Wong return es->s_checksum_type == EXT4_CRC32C_CHKSUM; 126d25425f8SDarrick J. Wong } 127d25425f8SDarrick J. Wong 128a9c47317SDarrick J. Wong static __le32 ext4_superblock_csum(struct super_block *sb, 129a9c47317SDarrick J. Wong struct ext4_super_block *es) 130a9c47317SDarrick J. Wong { 131a9c47317SDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 132a9c47317SDarrick J. Wong int offset = offsetof(struct ext4_super_block, s_checksum); 133a9c47317SDarrick J. Wong __u32 csum; 134a9c47317SDarrick J. Wong 135a9c47317SDarrick J. Wong csum = ext4_chksum(sbi, ~0, (char *)es, offset); 136a9c47317SDarrick J. Wong 137a9c47317SDarrick J. Wong return cpu_to_le32(csum); 138a9c47317SDarrick J. Wong } 139a9c47317SDarrick J. Wong 140a9c47317SDarrick J. Wong int ext4_superblock_csum_verify(struct super_block *sb, 141a9c47317SDarrick J. Wong struct ext4_super_block *es) 142a9c47317SDarrick J. Wong { 143a9c47317SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 144a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 145a9c47317SDarrick J. Wong return 1; 146a9c47317SDarrick J. Wong 147a9c47317SDarrick J. Wong return es->s_checksum == ext4_superblock_csum(sb, es); 148a9c47317SDarrick J. Wong } 149a9c47317SDarrick J. Wong 15006db49e6STheodore Ts'o void ext4_superblock_csum_set(struct super_block *sb) 151a9c47317SDarrick J. Wong { 15206db49e6STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 15306db49e6STheodore Ts'o 154a9c47317SDarrick J. Wong if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, 155a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 156a9c47317SDarrick J. Wong return; 157a9c47317SDarrick J. Wong 158a9c47317SDarrick J. Wong es->s_checksum = ext4_superblock_csum(sb, es); 159a9c47317SDarrick J. Wong } 160a9c47317SDarrick J. Wong 1619933fc0aSTheodore Ts'o void *ext4_kvmalloc(size_t size, gfp_t flags) 1629933fc0aSTheodore Ts'o { 1639933fc0aSTheodore Ts'o void *ret; 1649933fc0aSTheodore Ts'o 1658be04b93SJoe Perches ret = kmalloc(size, flags | __GFP_NOWARN); 1669933fc0aSTheodore Ts'o if (!ret) 1679933fc0aSTheodore Ts'o ret = __vmalloc(size, flags, PAGE_KERNEL); 1689933fc0aSTheodore Ts'o return ret; 1699933fc0aSTheodore Ts'o } 1709933fc0aSTheodore Ts'o 1719933fc0aSTheodore Ts'o void *ext4_kvzalloc(size_t size, gfp_t flags) 1729933fc0aSTheodore Ts'o { 1739933fc0aSTheodore Ts'o void *ret; 1749933fc0aSTheodore Ts'o 1758be04b93SJoe Perches ret = kzalloc(size, flags | __GFP_NOWARN); 1769933fc0aSTheodore Ts'o if (!ret) 1779933fc0aSTheodore Ts'o ret = __vmalloc(size, flags | __GFP_ZERO, PAGE_KERNEL); 1789933fc0aSTheodore Ts'o return ret; 1799933fc0aSTheodore Ts'o } 1809933fc0aSTheodore Ts'o 1819933fc0aSTheodore Ts'o void ext4_kvfree(void *ptr) 1829933fc0aSTheodore Ts'o { 1839933fc0aSTheodore Ts'o if (is_vmalloc_addr(ptr)) 1849933fc0aSTheodore Ts'o vfree(ptr); 1859933fc0aSTheodore Ts'o else 1869933fc0aSTheodore Ts'o kfree(ptr); 1879933fc0aSTheodore Ts'o 1889933fc0aSTheodore Ts'o } 1899933fc0aSTheodore Ts'o 1908fadc143SAlexandre Ratchov ext4_fsblk_t ext4_block_bitmap(struct super_block *sb, 1918fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 192bd81d8eeSLaurent Vivier { 1933a14589cSAneesh Kumar K.V return le32_to_cpu(bg->bg_block_bitmap_lo) | 1948fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 1958fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_block_bitmap_hi) << 32 : 0); 196bd81d8eeSLaurent Vivier } 197bd81d8eeSLaurent Vivier 1988fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_bitmap(struct super_block *sb, 1998fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 200bd81d8eeSLaurent Vivier { 2015272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_bitmap_lo) | 2028fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2038fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_bitmap_hi) << 32 : 0); 204bd81d8eeSLaurent Vivier } 205bd81d8eeSLaurent Vivier 2068fadc143SAlexandre Ratchov ext4_fsblk_t ext4_inode_table(struct super_block *sb, 2078fadc143SAlexandre Ratchov struct ext4_group_desc *bg) 208bd81d8eeSLaurent Vivier { 2095272f837SAneesh Kumar K.V return le32_to_cpu(bg->bg_inode_table_lo) | 2108fadc143SAlexandre Ratchov (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 2118fadc143SAlexandre Ratchov (ext4_fsblk_t)le32_to_cpu(bg->bg_inode_table_hi) << 32 : 0); 212bd81d8eeSLaurent Vivier } 213bd81d8eeSLaurent Vivier 214021b65bbSTheodore Ts'o __u32 ext4_free_group_clusters(struct super_block *sb, 215560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 216560671a0SAneesh Kumar K.V { 217560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_blocks_count_lo) | 218560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 219560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_blocks_count_hi) << 16 : 0); 220560671a0SAneesh Kumar K.V } 221560671a0SAneesh Kumar K.V 222560671a0SAneesh Kumar K.V __u32 ext4_free_inodes_count(struct super_block *sb, 223560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 224560671a0SAneesh Kumar K.V { 225560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_free_inodes_count_lo) | 226560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 227560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_free_inodes_count_hi) << 16 : 0); 228560671a0SAneesh Kumar K.V } 229560671a0SAneesh Kumar K.V 230560671a0SAneesh Kumar K.V __u32 ext4_used_dirs_count(struct super_block *sb, 231560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 232560671a0SAneesh Kumar K.V { 233560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_used_dirs_count_lo) | 234560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 235560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_used_dirs_count_hi) << 16 : 0); 236560671a0SAneesh Kumar K.V } 237560671a0SAneesh Kumar K.V 238560671a0SAneesh Kumar K.V __u32 ext4_itable_unused_count(struct super_block *sb, 239560671a0SAneesh Kumar K.V struct ext4_group_desc *bg) 240560671a0SAneesh Kumar K.V { 241560671a0SAneesh Kumar K.V return le16_to_cpu(bg->bg_itable_unused_lo) | 242560671a0SAneesh Kumar K.V (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT ? 243560671a0SAneesh Kumar K.V (__u32)le16_to_cpu(bg->bg_itable_unused_hi) << 16 : 0); 244560671a0SAneesh Kumar K.V } 245560671a0SAneesh Kumar K.V 2468fadc143SAlexandre Ratchov void ext4_block_bitmap_set(struct super_block *sb, 2478fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 248bd81d8eeSLaurent Vivier { 2493a14589cSAneesh Kumar K.V bg->bg_block_bitmap_lo = cpu_to_le32((u32)blk); 2508fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2518fadc143SAlexandre Ratchov bg->bg_block_bitmap_hi = cpu_to_le32(blk >> 32); 252bd81d8eeSLaurent Vivier } 253bd81d8eeSLaurent Vivier 2548fadc143SAlexandre Ratchov void ext4_inode_bitmap_set(struct super_block *sb, 2558fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 256bd81d8eeSLaurent Vivier { 2575272f837SAneesh Kumar K.V bg->bg_inode_bitmap_lo = cpu_to_le32((u32)blk); 2588fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2598fadc143SAlexandre Ratchov bg->bg_inode_bitmap_hi = cpu_to_le32(blk >> 32); 260bd81d8eeSLaurent Vivier } 261bd81d8eeSLaurent Vivier 2628fadc143SAlexandre Ratchov void ext4_inode_table_set(struct super_block *sb, 2638fadc143SAlexandre Ratchov struct ext4_group_desc *bg, ext4_fsblk_t blk) 264bd81d8eeSLaurent Vivier { 2655272f837SAneesh Kumar K.V bg->bg_inode_table_lo = cpu_to_le32((u32)blk); 2668fadc143SAlexandre Ratchov if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 2678fadc143SAlexandre Ratchov bg->bg_inode_table_hi = cpu_to_le32(blk >> 32); 268bd81d8eeSLaurent Vivier } 269bd81d8eeSLaurent Vivier 270021b65bbSTheodore Ts'o void ext4_free_group_clusters_set(struct super_block *sb, 271560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 272560671a0SAneesh Kumar K.V { 273560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_lo = cpu_to_le16((__u16)count); 274560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 275560671a0SAneesh Kumar K.V bg->bg_free_blocks_count_hi = cpu_to_le16(count >> 16); 276560671a0SAneesh Kumar K.V } 277560671a0SAneesh Kumar K.V 278560671a0SAneesh Kumar K.V void ext4_free_inodes_set(struct super_block *sb, 279560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 280560671a0SAneesh Kumar K.V { 281560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_lo = cpu_to_le16((__u16)count); 282560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 283560671a0SAneesh Kumar K.V bg->bg_free_inodes_count_hi = cpu_to_le16(count >> 16); 284560671a0SAneesh Kumar K.V } 285560671a0SAneesh Kumar K.V 286560671a0SAneesh Kumar K.V void ext4_used_dirs_set(struct super_block *sb, 287560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 288560671a0SAneesh Kumar K.V { 289560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_lo = cpu_to_le16((__u16)count); 290560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 291560671a0SAneesh Kumar K.V bg->bg_used_dirs_count_hi = cpu_to_le16(count >> 16); 292560671a0SAneesh Kumar K.V } 293560671a0SAneesh Kumar K.V 294560671a0SAneesh Kumar K.V void ext4_itable_unused_set(struct super_block *sb, 295560671a0SAneesh Kumar K.V struct ext4_group_desc *bg, __u32 count) 296560671a0SAneesh Kumar K.V { 297560671a0SAneesh Kumar K.V bg->bg_itable_unused_lo = cpu_to_le16((__u16)count); 298560671a0SAneesh Kumar K.V if (EXT4_DESC_SIZE(sb) >= EXT4_MIN_DESC_SIZE_64BIT) 299560671a0SAneesh Kumar K.V bg->bg_itable_unused_hi = cpu_to_le16(count >> 16); 300560671a0SAneesh Kumar K.V } 301560671a0SAneesh Kumar K.V 302d3d1faf6SCurt Wohlgemuth 3031c13d5c0STheodore Ts'o static void __save_error_info(struct super_block *sb, const char *func, 3041c13d5c0STheodore Ts'o unsigned int line) 3051c13d5c0STheodore Ts'o { 3061c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 3071c13d5c0STheodore Ts'o 3081c13d5c0STheodore Ts'o EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 3091c13d5c0STheodore Ts'o es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 3101c13d5c0STheodore Ts'o es->s_last_error_time = cpu_to_le32(get_seconds()); 3111c13d5c0STheodore Ts'o strncpy(es->s_last_error_func, func, sizeof(es->s_last_error_func)); 3121c13d5c0STheodore Ts'o es->s_last_error_line = cpu_to_le32(line); 3131c13d5c0STheodore Ts'o if (!es->s_first_error_time) { 3141c13d5c0STheodore Ts'o es->s_first_error_time = es->s_last_error_time; 3151c13d5c0STheodore Ts'o strncpy(es->s_first_error_func, func, 3161c13d5c0STheodore Ts'o sizeof(es->s_first_error_func)); 3171c13d5c0STheodore Ts'o es->s_first_error_line = cpu_to_le32(line); 3181c13d5c0STheodore Ts'o es->s_first_error_ino = es->s_last_error_ino; 3191c13d5c0STheodore Ts'o es->s_first_error_block = es->s_last_error_block; 3201c13d5c0STheodore Ts'o } 32166e61a9eSTheodore Ts'o /* 32266e61a9eSTheodore Ts'o * Start the daily error reporting function if it hasn't been 32366e61a9eSTheodore Ts'o * started already 32466e61a9eSTheodore Ts'o */ 32566e61a9eSTheodore Ts'o if (!es->s_error_count) 32666e61a9eSTheodore Ts'o mod_timer(&EXT4_SB(sb)->s_err_report, jiffies + 24*60*60*HZ); 327ba39ebb6SWei Yongjun le32_add_cpu(&es->s_error_count, 1); 3281c13d5c0STheodore Ts'o } 3291c13d5c0STheodore Ts'o 3301c13d5c0STheodore Ts'o static void save_error_info(struct super_block *sb, const char *func, 3311c13d5c0STheodore Ts'o unsigned int line) 3321c13d5c0STheodore Ts'o { 3331c13d5c0STheodore Ts'o __save_error_info(sb, func, line); 3341c13d5c0STheodore Ts'o ext4_commit_super(sb, 1); 3351c13d5c0STheodore Ts'o } 3361c13d5c0STheodore Ts'o 3377c2e7087STheodore Ts'o /* 3387c2e7087STheodore Ts'o * The del_gendisk() function uninitializes the disk-specific data 3397c2e7087STheodore Ts'o * structures, including the bdi structure, without telling anyone 3407c2e7087STheodore Ts'o * else. Once this happens, any attempt to call mark_buffer_dirty() 3417c2e7087STheodore Ts'o * (for example, by ext4_commit_super), will cause a kernel OOPS. 3427c2e7087STheodore Ts'o * This is a kludge to prevent these oops until we can put in a proper 3437c2e7087STheodore Ts'o * hook in del_gendisk() to inform the VFS and file system layers. 3447c2e7087STheodore Ts'o */ 3457c2e7087STheodore Ts'o static int block_device_ejected(struct super_block *sb) 3467c2e7087STheodore Ts'o { 3477c2e7087STheodore Ts'o struct inode *bd_inode = sb->s_bdev->bd_inode; 3487c2e7087STheodore Ts'o struct backing_dev_info *bdi = bd_inode->i_mapping->backing_dev_info; 3497c2e7087STheodore Ts'o 3507c2e7087STheodore Ts'o return bdi->dev == NULL; 3517c2e7087STheodore Ts'o } 3527c2e7087STheodore Ts'o 35318aadd47SBobi Jam static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn) 35418aadd47SBobi Jam { 35518aadd47SBobi Jam struct super_block *sb = journal->j_private; 35618aadd47SBobi Jam struct ext4_sb_info *sbi = EXT4_SB(sb); 35718aadd47SBobi Jam int error = is_journal_aborted(journal); 3585d3ee208SDmitry Monakhov struct ext4_journal_cb_entry *jce; 35918aadd47SBobi Jam 3605d3ee208SDmitry Monakhov BUG_ON(txn->t_state == T_FINISHED); 36118aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 3625d3ee208SDmitry Monakhov while (!list_empty(&txn->t_private_list)) { 3635d3ee208SDmitry Monakhov jce = list_entry(txn->t_private_list.next, 3645d3ee208SDmitry Monakhov struct ext4_journal_cb_entry, jce_list); 36518aadd47SBobi Jam list_del_init(&jce->jce_list); 36618aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 36718aadd47SBobi Jam jce->jce_func(sb, jce, error); 36818aadd47SBobi Jam spin_lock(&sbi->s_md_lock); 36918aadd47SBobi Jam } 37018aadd47SBobi Jam spin_unlock(&sbi->s_md_lock); 37118aadd47SBobi Jam } 3721c13d5c0STheodore Ts'o 373ac27a0ecSDave Kleikamp /* Deal with the reporting of failure conditions on a filesystem such as 374ac27a0ecSDave Kleikamp * inconsistencies detected or read IO failures. 375ac27a0ecSDave Kleikamp * 376ac27a0ecSDave Kleikamp * On ext2, we can store the error state of the filesystem in the 377617ba13bSMingming Cao * superblock. That is not possible on ext4, because we may have other 378ac27a0ecSDave Kleikamp * write ordering constraints on the superblock which prevent us from 379ac27a0ecSDave Kleikamp * writing it out straight away; and given that the journal is about to 380ac27a0ecSDave Kleikamp * be aborted, we can't rely on the current, or future, transactions to 381ac27a0ecSDave Kleikamp * write out the superblock safely. 382ac27a0ecSDave Kleikamp * 383dab291afSMingming Cao * We'll just use the jbd2_journal_abort() error code to record an error in 384d6b198bcSThadeu Lima de Souza Cascardo * the journal instead. On recovery, the journal will complain about 385ac27a0ecSDave Kleikamp * that error until we've noted it down and cleared it. 386ac27a0ecSDave Kleikamp */ 387ac27a0ecSDave Kleikamp 388617ba13bSMingming Cao static void ext4_handle_error(struct super_block *sb) 389ac27a0ecSDave Kleikamp { 390ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 391ac27a0ecSDave Kleikamp return; 392ac27a0ecSDave Kleikamp 393ac27a0ecSDave Kleikamp if (!test_opt(sb, ERRORS_CONT)) { 394617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 395ac27a0ecSDave Kleikamp 3964ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 397ac27a0ecSDave Kleikamp if (journal) 398dab291afSMingming Cao jbd2_journal_abort(journal, -EIO); 399ac27a0ecSDave Kleikamp } 400ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_RO)) { 401b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 4024418e141SDmitry Monakhov /* 4034418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 4044418e141SDmitry Monakhov * before ->s_flags update 4054418e141SDmitry Monakhov */ 4064418e141SDmitry Monakhov smp_wmb(); 407ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 408ac27a0ecSDave Kleikamp } 409ac27a0ecSDave Kleikamp if (test_opt(sb, ERRORS_PANIC)) 410617ba13bSMingming Cao panic("EXT4-fs (device %s): panic forced after error\n", 411ac27a0ecSDave Kleikamp sb->s_id); 412ac27a0ecSDave Kleikamp } 413ac27a0ecSDave Kleikamp 414efbed4dcSTheodore Ts'o #define ext4_error_ratelimit(sb) \ 415efbed4dcSTheodore Ts'o ___ratelimit(&(EXT4_SB(sb)->s_err_ratelimit_state), \ 416efbed4dcSTheodore Ts'o "EXT4-fs error") 417efbed4dcSTheodore Ts'o 41812062dddSEric Sandeen void __ext4_error(struct super_block *sb, const char *function, 419c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 420ac27a0ecSDave Kleikamp { 4210ff2ea7dSJoe Perches struct va_format vaf; 422ac27a0ecSDave Kleikamp va_list args; 423ac27a0ecSDave Kleikamp 424efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 425ac27a0ecSDave Kleikamp va_start(args, fmt); 4260ff2ea7dSJoe Perches vaf.fmt = fmt; 4270ff2ea7dSJoe Perches vaf.va = &args; 428efbed4dcSTheodore Ts'o printk(KERN_CRIT 429efbed4dcSTheodore Ts'o "EXT4-fs error (device %s): %s:%d: comm %s: %pV\n", 4300ff2ea7dSJoe Perches sb->s_id, function, line, current->comm, &vaf); 431ac27a0ecSDave Kleikamp va_end(args); 432efbed4dcSTheodore Ts'o } 433f3fc0210STheodore Ts'o save_error_info(sb, function, line); 434617ba13bSMingming Cao ext4_handle_error(sb); 435ac27a0ecSDave Kleikamp } 436ac27a0ecSDave Kleikamp 437e7c96e8eSJoe Perches void __ext4_error_inode(struct inode *inode, const char *function, 438c398eda0STheodore Ts'o unsigned int line, ext4_fsblk_t block, 439273df556SFrank Mayhar const char *fmt, ...) 440273df556SFrank Mayhar { 441273df556SFrank Mayhar va_list args; 442f7c21177STheodore Ts'o struct va_format vaf; 4431c13d5c0STheodore Ts'o struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es; 444273df556SFrank Mayhar 4451c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 4461c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 447efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 448273df556SFrank Mayhar va_start(args, fmt); 449f7c21177STheodore Ts'o vaf.fmt = fmt; 450f7c21177STheodore Ts'o vaf.va = &args; 451c398eda0STheodore Ts'o if (block) 452d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 453d9ee81daSJoe Perches "inode #%lu: block %llu: comm %s: %pV\n", 454d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 455d9ee81daSJoe Perches block, current->comm, &vaf); 456d9ee81daSJoe Perches else 457d9ee81daSJoe Perches printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: " 458d9ee81daSJoe Perches "inode #%lu: comm %s: %pV\n", 459d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 460d9ee81daSJoe Perches current->comm, &vaf); 461273df556SFrank Mayhar va_end(args); 462efbed4dcSTheodore Ts'o } 463efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 464273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 465273df556SFrank Mayhar } 466273df556SFrank Mayhar 467e7c96e8eSJoe Perches void __ext4_error_file(struct file *file, const char *function, 468f7c21177STheodore Ts'o unsigned int line, ext4_fsblk_t block, 469f7c21177STheodore Ts'o const char *fmt, ...) 470273df556SFrank Mayhar { 471273df556SFrank Mayhar va_list args; 472f7c21177STheodore Ts'o struct va_format vaf; 4731c13d5c0STheodore Ts'o struct ext4_super_block *es; 474496ad9aaSAl Viro struct inode *inode = file_inode(file); 475273df556SFrank Mayhar char pathname[80], *path; 476273df556SFrank Mayhar 4771c13d5c0STheodore Ts'o es = EXT4_SB(inode->i_sb)->s_es; 4781c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(inode->i_ino); 479efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(inode->i_sb)) { 480273df556SFrank Mayhar path = d_path(&(file->f_path), pathname, sizeof(pathname)); 481f9a62d09SDan Carpenter if (IS_ERR(path)) 482273df556SFrank Mayhar path = "(unknown)"; 483f7c21177STheodore Ts'o va_start(args, fmt); 484f7c21177STheodore Ts'o vaf.fmt = fmt; 485f7c21177STheodore Ts'o vaf.va = &args; 486d9ee81daSJoe Perches if (block) 487d9ee81daSJoe Perches printk(KERN_CRIT 488d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 489d9ee81daSJoe Perches "block %llu: comm %s: path %s: %pV\n", 490d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 491d9ee81daSJoe Perches block, current->comm, path, &vaf); 492d9ee81daSJoe Perches else 493d9ee81daSJoe Perches printk(KERN_CRIT 494d9ee81daSJoe Perches "EXT4-fs error (device %s): %s:%d: inode #%lu: " 495d9ee81daSJoe Perches "comm %s: path %s: %pV\n", 496d9ee81daSJoe Perches inode->i_sb->s_id, function, line, inode->i_ino, 497d9ee81daSJoe Perches current->comm, path, &vaf); 498273df556SFrank Mayhar va_end(args); 499efbed4dcSTheodore Ts'o } 500efbed4dcSTheodore Ts'o save_error_info(inode->i_sb, function, line); 501273df556SFrank Mayhar ext4_handle_error(inode->i_sb); 502273df556SFrank Mayhar } 503273df556SFrank Mayhar 504722887ddSTheodore Ts'o const char *ext4_decode_error(struct super_block *sb, int errno, 505ac27a0ecSDave Kleikamp char nbuf[16]) 506ac27a0ecSDave Kleikamp { 507ac27a0ecSDave Kleikamp char *errstr = NULL; 508ac27a0ecSDave Kleikamp 509ac27a0ecSDave Kleikamp switch (errno) { 510ac27a0ecSDave Kleikamp case -EIO: 511ac27a0ecSDave Kleikamp errstr = "IO failure"; 512ac27a0ecSDave Kleikamp break; 513ac27a0ecSDave Kleikamp case -ENOMEM: 514ac27a0ecSDave Kleikamp errstr = "Out of memory"; 515ac27a0ecSDave Kleikamp break; 516ac27a0ecSDave Kleikamp case -EROFS: 51778f1ddbbSTheodore Ts'o if (!sb || (EXT4_SB(sb)->s_journal && 51878f1ddbbSTheodore Ts'o EXT4_SB(sb)->s_journal->j_flags & JBD2_ABORT)) 519ac27a0ecSDave Kleikamp errstr = "Journal has aborted"; 520ac27a0ecSDave Kleikamp else 521ac27a0ecSDave Kleikamp errstr = "Readonly filesystem"; 522ac27a0ecSDave Kleikamp break; 523ac27a0ecSDave Kleikamp default: 524ac27a0ecSDave Kleikamp /* If the caller passed in an extra buffer for unknown 525ac27a0ecSDave Kleikamp * errors, textualise them now. Else we just return 526ac27a0ecSDave Kleikamp * NULL. */ 527ac27a0ecSDave Kleikamp if (nbuf) { 528ac27a0ecSDave Kleikamp /* Check for truncated error codes... */ 529ac27a0ecSDave Kleikamp if (snprintf(nbuf, 16, "error %d", -errno) >= 0) 530ac27a0ecSDave Kleikamp errstr = nbuf; 531ac27a0ecSDave Kleikamp } 532ac27a0ecSDave Kleikamp break; 533ac27a0ecSDave Kleikamp } 534ac27a0ecSDave Kleikamp 535ac27a0ecSDave Kleikamp return errstr; 536ac27a0ecSDave Kleikamp } 537ac27a0ecSDave Kleikamp 538617ba13bSMingming Cao /* __ext4_std_error decodes expected errors from journaling functions 539ac27a0ecSDave Kleikamp * automatically and invokes the appropriate error response. */ 540ac27a0ecSDave Kleikamp 541c398eda0STheodore Ts'o void __ext4_std_error(struct super_block *sb, const char *function, 542c398eda0STheodore Ts'o unsigned int line, int errno) 543ac27a0ecSDave Kleikamp { 544ac27a0ecSDave Kleikamp char nbuf[16]; 545ac27a0ecSDave Kleikamp const char *errstr; 546ac27a0ecSDave Kleikamp 547ac27a0ecSDave Kleikamp /* Special case: if the error is EROFS, and we're not already 548ac27a0ecSDave Kleikamp * inside a transaction, then there's really no point in logging 549ac27a0ecSDave Kleikamp * an error. */ 550ac27a0ecSDave Kleikamp if (errno == -EROFS && journal_current_handle() == NULL && 551ac27a0ecSDave Kleikamp (sb->s_flags & MS_RDONLY)) 552ac27a0ecSDave Kleikamp return; 553ac27a0ecSDave Kleikamp 554efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 555617ba13bSMingming Cao errstr = ext4_decode_error(sb, errno, nbuf); 556c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s) in %s:%d: %s\n", 557c398eda0STheodore Ts'o sb->s_id, function, line, errstr); 558efbed4dcSTheodore Ts'o } 559ac27a0ecSDave Kleikamp 560efbed4dcSTheodore Ts'o save_error_info(sb, function, line); 561617ba13bSMingming Cao ext4_handle_error(sb); 562ac27a0ecSDave Kleikamp } 563ac27a0ecSDave Kleikamp 564ac27a0ecSDave Kleikamp /* 565617ba13bSMingming Cao * ext4_abort is a much stronger failure handler than ext4_error. The 566ac27a0ecSDave Kleikamp * abort function may be used to deal with unrecoverable failures such 567ac27a0ecSDave Kleikamp * as journal IO errors or ENOMEM at a critical moment in log management. 568ac27a0ecSDave Kleikamp * 569ac27a0ecSDave Kleikamp * We unconditionally force the filesystem into an ABORT|READONLY state, 570ac27a0ecSDave Kleikamp * unless the error response on the fs has been set to panic in which 571ac27a0ecSDave Kleikamp * case we take the easy way out and panic immediately. 572ac27a0ecSDave Kleikamp */ 573ac27a0ecSDave Kleikamp 574c67d859eSTheodore Ts'o void __ext4_abort(struct super_block *sb, const char *function, 575c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 576ac27a0ecSDave Kleikamp { 577ac27a0ecSDave Kleikamp va_list args; 578ac27a0ecSDave Kleikamp 5791c13d5c0STheodore Ts'o save_error_info(sb, function, line); 580ac27a0ecSDave Kleikamp va_start(args, fmt); 581c398eda0STheodore Ts'o printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: ", sb->s_id, 582c398eda0STheodore Ts'o function, line); 583ac27a0ecSDave Kleikamp vprintk(fmt, args); 584ac27a0ecSDave Kleikamp printk("\n"); 585ac27a0ecSDave Kleikamp va_end(args); 586ac27a0ecSDave Kleikamp 5871c13d5c0STheodore Ts'o if ((sb->s_flags & MS_RDONLY) == 0) { 588b31e1552SEric Sandeen ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only"); 5894ab2f15bSTheodore Ts'o EXT4_SB(sb)->s_mount_flags |= EXT4_MF_FS_ABORTED; 5904418e141SDmitry Monakhov /* 5914418e141SDmitry Monakhov * Make sure updated value of ->s_mount_flags will be visible 5924418e141SDmitry Monakhov * before ->s_flags update 5934418e141SDmitry Monakhov */ 5944418e141SDmitry Monakhov smp_wmb(); 5954418e141SDmitry Monakhov sb->s_flags |= MS_RDONLY; 596ef2cabf7SHidehiro Kawai if (EXT4_SB(sb)->s_journal) 597dab291afSMingming Cao jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO); 5981c13d5c0STheodore Ts'o save_error_info(sb, function, line); 5991c13d5c0STheodore Ts'o } 6001c13d5c0STheodore Ts'o if (test_opt(sb, ERRORS_PANIC)) 6011c13d5c0STheodore Ts'o panic("EXT4-fs panic from previous error\n"); 602ac27a0ecSDave Kleikamp } 603ac27a0ecSDave Kleikamp 604e7c96e8eSJoe Perches void __ext4_msg(struct super_block *sb, 605e7c96e8eSJoe Perches const char *prefix, const char *fmt, ...) 606b31e1552SEric Sandeen { 6070ff2ea7dSJoe Perches struct va_format vaf; 608b31e1552SEric Sandeen va_list args; 609b31e1552SEric Sandeen 610efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_msg_ratelimit_state), "EXT4-fs")) 611efbed4dcSTheodore Ts'o return; 612efbed4dcSTheodore Ts'o 613b31e1552SEric Sandeen va_start(args, fmt); 6140ff2ea7dSJoe Perches vaf.fmt = fmt; 6150ff2ea7dSJoe Perches vaf.va = &args; 6160ff2ea7dSJoe Perches printk("%sEXT4-fs (%s): %pV\n", prefix, sb->s_id, &vaf); 617b31e1552SEric Sandeen va_end(args); 618b31e1552SEric Sandeen } 619b31e1552SEric Sandeen 62012062dddSEric Sandeen void __ext4_warning(struct super_block *sb, const char *function, 621c398eda0STheodore Ts'o unsigned int line, const char *fmt, ...) 622ac27a0ecSDave Kleikamp { 6230ff2ea7dSJoe Perches struct va_format vaf; 624ac27a0ecSDave Kleikamp va_list args; 625ac27a0ecSDave Kleikamp 626efbed4dcSTheodore Ts'o if (!___ratelimit(&(EXT4_SB(sb)->s_warning_ratelimit_state), 627efbed4dcSTheodore Ts'o "EXT4-fs warning")) 628efbed4dcSTheodore Ts'o return; 629efbed4dcSTheodore Ts'o 630ac27a0ecSDave Kleikamp va_start(args, fmt); 6310ff2ea7dSJoe Perches vaf.fmt = fmt; 6320ff2ea7dSJoe Perches vaf.va = &args; 6330ff2ea7dSJoe Perches printk(KERN_WARNING "EXT4-fs warning (device %s): %s:%d: %pV\n", 6340ff2ea7dSJoe Perches sb->s_id, function, line, &vaf); 635ac27a0ecSDave Kleikamp va_end(args); 636ac27a0ecSDave Kleikamp } 637ac27a0ecSDave Kleikamp 638e29136f8STheodore Ts'o void __ext4_grp_locked_error(const char *function, unsigned int line, 639e29136f8STheodore Ts'o struct super_block *sb, ext4_group_t grp, 640e29136f8STheodore Ts'o unsigned long ino, ext4_fsblk_t block, 641e29136f8STheodore Ts'o const char *fmt, ...) 6425d1b1b3fSAneesh Kumar K.V __releases(bitlock) 6435d1b1b3fSAneesh Kumar K.V __acquires(bitlock) 6445d1b1b3fSAneesh Kumar K.V { 6450ff2ea7dSJoe Perches struct va_format vaf; 6465d1b1b3fSAneesh Kumar K.V va_list args; 6475d1b1b3fSAneesh Kumar K.V struct ext4_super_block *es = EXT4_SB(sb)->s_es; 6485d1b1b3fSAneesh Kumar K.V 6491c13d5c0STheodore Ts'o es->s_last_error_ino = cpu_to_le32(ino); 6501c13d5c0STheodore Ts'o es->s_last_error_block = cpu_to_le64(block); 6511c13d5c0STheodore Ts'o __save_error_info(sb, function, line); 6520ff2ea7dSJoe Perches 653efbed4dcSTheodore Ts'o if (ext4_error_ratelimit(sb)) { 6545d1b1b3fSAneesh Kumar K.V va_start(args, fmt); 6550ff2ea7dSJoe Perches vaf.fmt = fmt; 6560ff2ea7dSJoe Perches vaf.va = &args; 65721149d61SRobin Dong printk(KERN_CRIT "EXT4-fs error (device %s): %s:%d: group %u, ", 658e29136f8STheodore Ts'o sb->s_id, function, line, grp); 659e29136f8STheodore Ts'o if (ino) 6600ff2ea7dSJoe Perches printk(KERN_CONT "inode %lu: ", ino); 661e29136f8STheodore Ts'o if (block) 662efbed4dcSTheodore Ts'o printk(KERN_CONT "block %llu:", 663efbed4dcSTheodore Ts'o (unsigned long long) block); 6640ff2ea7dSJoe Perches printk(KERN_CONT "%pV\n", &vaf); 6655d1b1b3fSAneesh Kumar K.V va_end(args); 666efbed4dcSTheodore Ts'o } 6675d1b1b3fSAneesh Kumar K.V 6685d1b1b3fSAneesh Kumar K.V if (test_opt(sb, ERRORS_CONT)) { 669e2d67052STheodore Ts'o ext4_commit_super(sb, 0); 6705d1b1b3fSAneesh Kumar K.V return; 6715d1b1b3fSAneesh Kumar K.V } 6721c13d5c0STheodore Ts'o 6735d1b1b3fSAneesh Kumar K.V ext4_unlock_group(sb, grp); 6745d1b1b3fSAneesh Kumar K.V ext4_handle_error(sb); 6755d1b1b3fSAneesh Kumar K.V /* 6765d1b1b3fSAneesh Kumar K.V * We only get here in the ERRORS_RO case; relocking the group 6775d1b1b3fSAneesh Kumar K.V * may be dangerous, but nothing bad will happen since the 6785d1b1b3fSAneesh Kumar K.V * filesystem will have already been marked read/only and the 6795d1b1b3fSAneesh Kumar K.V * journal has been aborted. We return 1 as a hint to callers 6805d1b1b3fSAneesh Kumar K.V * who might what to use the return value from 68125985edcSLucas De Marchi * ext4_grp_locked_error() to distinguish between the 6825d1b1b3fSAneesh Kumar K.V * ERRORS_CONT and ERRORS_RO case, and perhaps return more 6835d1b1b3fSAneesh Kumar K.V * aggressively from the ext4 function in question, with a 6845d1b1b3fSAneesh Kumar K.V * more appropriate error code. 6855d1b1b3fSAneesh Kumar K.V */ 6865d1b1b3fSAneesh Kumar K.V ext4_lock_group(sb, grp); 6875d1b1b3fSAneesh Kumar K.V return; 6885d1b1b3fSAneesh Kumar K.V } 6895d1b1b3fSAneesh Kumar K.V 690617ba13bSMingming Cao void ext4_update_dynamic_rev(struct super_block *sb) 691ac27a0ecSDave Kleikamp { 692617ba13bSMingming Cao struct ext4_super_block *es = EXT4_SB(sb)->s_es; 693ac27a0ecSDave Kleikamp 694617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_GOOD_OLD_REV) 695ac27a0ecSDave Kleikamp return; 696ac27a0ecSDave Kleikamp 69712062dddSEric Sandeen ext4_warning(sb, 698ac27a0ecSDave Kleikamp "updating to rev %d because of new feature flag, " 699ac27a0ecSDave Kleikamp "running e2fsck is recommended", 700617ba13bSMingming Cao EXT4_DYNAMIC_REV); 701ac27a0ecSDave Kleikamp 702617ba13bSMingming Cao es->s_first_ino = cpu_to_le32(EXT4_GOOD_OLD_FIRST_INO); 703617ba13bSMingming Cao es->s_inode_size = cpu_to_le16(EXT4_GOOD_OLD_INODE_SIZE); 704617ba13bSMingming Cao es->s_rev_level = cpu_to_le32(EXT4_DYNAMIC_REV); 705ac27a0ecSDave Kleikamp /* leave es->s_feature_*compat flags alone */ 706ac27a0ecSDave Kleikamp /* es->s_uuid will be set by e2fsck if empty */ 707ac27a0ecSDave Kleikamp 708ac27a0ecSDave Kleikamp /* 709ac27a0ecSDave Kleikamp * The rest of the superblock fields should be zero, and if not it 710ac27a0ecSDave Kleikamp * means they are likely already in use, so leave them alone. We 711ac27a0ecSDave Kleikamp * can leave it up to e2fsck to clean up any inconsistencies there. 712ac27a0ecSDave Kleikamp */ 713ac27a0ecSDave Kleikamp } 714ac27a0ecSDave Kleikamp 715ac27a0ecSDave Kleikamp /* 716ac27a0ecSDave Kleikamp * Open the external journal device 717ac27a0ecSDave Kleikamp */ 718b31e1552SEric Sandeen static struct block_device *ext4_blkdev_get(dev_t dev, struct super_block *sb) 719ac27a0ecSDave Kleikamp { 720ac27a0ecSDave Kleikamp struct block_device *bdev; 721ac27a0ecSDave Kleikamp char b[BDEVNAME_SIZE]; 722ac27a0ecSDave Kleikamp 723d4d77629STejun Heo bdev = blkdev_get_by_dev(dev, FMODE_READ|FMODE_WRITE|FMODE_EXCL, sb); 724ac27a0ecSDave Kleikamp if (IS_ERR(bdev)) 725ac27a0ecSDave Kleikamp goto fail; 726ac27a0ecSDave Kleikamp return bdev; 727ac27a0ecSDave Kleikamp 728ac27a0ecSDave Kleikamp fail: 729b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to open journal device %s: %ld", 730ac27a0ecSDave Kleikamp __bdevname(dev, b), PTR_ERR(bdev)); 731ac27a0ecSDave Kleikamp return NULL; 732ac27a0ecSDave Kleikamp } 733ac27a0ecSDave Kleikamp 734ac27a0ecSDave Kleikamp /* 735ac27a0ecSDave Kleikamp * Release the journal device 736ac27a0ecSDave Kleikamp */ 7374385bab1SAl Viro static void ext4_blkdev_put(struct block_device *bdev) 738ac27a0ecSDave Kleikamp { 7394385bab1SAl Viro blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL); 740ac27a0ecSDave Kleikamp } 741ac27a0ecSDave Kleikamp 7424385bab1SAl Viro static void ext4_blkdev_remove(struct ext4_sb_info *sbi) 743ac27a0ecSDave Kleikamp { 744ac27a0ecSDave Kleikamp struct block_device *bdev; 745ac27a0ecSDave Kleikamp bdev = sbi->journal_bdev; 746ac27a0ecSDave Kleikamp if (bdev) { 7474385bab1SAl Viro ext4_blkdev_put(bdev); 748ac27a0ecSDave Kleikamp sbi->journal_bdev = NULL; 749ac27a0ecSDave Kleikamp } 750ac27a0ecSDave Kleikamp } 751ac27a0ecSDave Kleikamp 752ac27a0ecSDave Kleikamp static inline struct inode *orphan_list_entry(struct list_head *l) 753ac27a0ecSDave Kleikamp { 754617ba13bSMingming Cao return &list_entry(l, struct ext4_inode_info, i_orphan)->vfs_inode; 755ac27a0ecSDave Kleikamp } 756ac27a0ecSDave Kleikamp 757617ba13bSMingming Cao static void dump_orphan_list(struct super_block *sb, struct ext4_sb_info *sbi) 758ac27a0ecSDave Kleikamp { 759ac27a0ecSDave Kleikamp struct list_head *l; 760ac27a0ecSDave Kleikamp 761b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "sb orphan head is %d", 762ac27a0ecSDave Kleikamp le32_to_cpu(sbi->s_es->s_last_orphan)); 763ac27a0ecSDave Kleikamp 764ac27a0ecSDave Kleikamp printk(KERN_ERR "sb_info orphan list:\n"); 765ac27a0ecSDave Kleikamp list_for_each(l, &sbi->s_orphan) { 766ac27a0ecSDave Kleikamp struct inode *inode = orphan_list_entry(l); 767ac27a0ecSDave Kleikamp printk(KERN_ERR " " 768ac27a0ecSDave Kleikamp "inode %s:%lu at %p: mode %o, nlink %d, next %d\n", 769ac27a0ecSDave Kleikamp inode->i_sb->s_id, inode->i_ino, inode, 770ac27a0ecSDave Kleikamp inode->i_mode, inode->i_nlink, 771ac27a0ecSDave Kleikamp NEXT_ORPHAN(inode)); 772ac27a0ecSDave Kleikamp } 773ac27a0ecSDave Kleikamp } 774ac27a0ecSDave Kleikamp 775617ba13bSMingming Cao static void ext4_put_super(struct super_block *sb) 776ac27a0ecSDave Kleikamp { 777617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 778617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 779ef2cabf7SHidehiro Kawai int i, err; 780ac27a0ecSDave Kleikamp 781857ac889SLukas Czerner ext4_unregister_li_request(sb); 782e0ccfd95SChristoph Hellwig dquot_disable(sb, -1, DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED); 783e0ccfd95SChristoph Hellwig 7842e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 7852e8fa54eSJan Kara destroy_workqueue(sbi->rsv_conversion_wq); 7864c0425ffSMingming Cao 7870390131bSFrank Mayhar if (sbi->s_journal) { 788ef2cabf7SHidehiro Kawai err = jbd2_journal_destroy(sbi->s_journal); 78947b4a50bSJan Kara sbi->s_journal = NULL; 790ef2cabf7SHidehiro Kawai if (err < 0) 791c67d859eSTheodore Ts'o ext4_abort(sb, "Couldn't clean up the journal"); 7920390131bSFrank Mayhar } 793d4edac31SJosef Bacik 794d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 7959105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 796d4edac31SJosef Bacik ext4_release_system_zone(sb); 797d4edac31SJosef Bacik ext4_mb_release(sb); 798d4edac31SJosef Bacik ext4_ext_release(sb); 799d4edac31SJosef Bacik ext4_xattr_put_super(sb); 800d4edac31SJosef Bacik 801ac27a0ecSDave Kleikamp if (!(sb->s_flags & MS_RDONLY)) { 802617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 803ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 804ac27a0ecSDave Kleikamp } 80558c5873aSArtem Bityutskiy if (!(sb->s_flags & MS_RDONLY)) 806a8e25a83SArtem Bityutskiy ext4_commit_super(sb, 1); 807a8e25a83SArtem Bityutskiy 808240799cdSTheodore Ts'o if (sbi->s_proc) { 80966acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 8109f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 811240799cdSTheodore Ts'o } 8123197ebdbSTheodore Ts'o kobject_del(&sbi->s_kobj); 813ac27a0ecSDave Kleikamp 814ac27a0ecSDave Kleikamp for (i = 0; i < sbi->s_gdb_count; i++) 815ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 816f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 8179933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 81857042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 819ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_freeinodes_counter); 820ac27a0ecSDave Kleikamp percpu_counter_destroy(&sbi->s_dirs_counter); 82157042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 8221ac6466fSTheodore Ts'o percpu_counter_destroy(&sbi->s_extent_cache_cnt); 823ac27a0ecSDave Kleikamp brelse(sbi->s_sbh); 824ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 825ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 826ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 827ac27a0ecSDave Kleikamp #endif 828ac27a0ecSDave Kleikamp 829ac27a0ecSDave Kleikamp /* Debugging code just in case the in-memory inode orphan list 830ac27a0ecSDave Kleikamp * isn't empty. The on-disk one can be non-empty if we've 831ac27a0ecSDave Kleikamp * detected an error and taken the fs readonly, but the 832ac27a0ecSDave Kleikamp * in-memory list had better be clean by this point. */ 833ac27a0ecSDave Kleikamp if (!list_empty(&sbi->s_orphan)) 834ac27a0ecSDave Kleikamp dump_orphan_list(sb, sbi); 835ac27a0ecSDave Kleikamp J_ASSERT(list_empty(&sbi->s_orphan)); 836ac27a0ecSDave Kleikamp 837f98393a6SPeter Zijlstra invalidate_bdev(sb->s_bdev); 838ac27a0ecSDave Kleikamp if (sbi->journal_bdev && sbi->journal_bdev != sb->s_bdev) { 839ac27a0ecSDave Kleikamp /* 840ac27a0ecSDave Kleikamp * Invalidate the journal device's buffers. We don't want them 841ac27a0ecSDave Kleikamp * floating about in memory - the physical journal device may 842ac27a0ecSDave Kleikamp * hotswapped, and it breaks the `ro-after' testing code. 843ac27a0ecSDave Kleikamp */ 844ac27a0ecSDave Kleikamp sync_blockdev(sbi->journal_bdev); 845f98393a6SPeter Zijlstra invalidate_bdev(sbi->journal_bdev); 846617ba13bSMingming Cao ext4_blkdev_remove(sbi); 847ac27a0ecSDave Kleikamp } 848c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 849c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 850ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 8513197ebdbSTheodore Ts'o /* 8523197ebdbSTheodore Ts'o * Now that we are completely done shutting down the 8533197ebdbSTheodore Ts'o * superblock, we need to actually destroy the kobject. 8543197ebdbSTheodore Ts'o */ 8553197ebdbSTheodore Ts'o kobject_put(&sbi->s_kobj); 8563197ebdbSTheodore Ts'o wait_for_completion(&sbi->s_kobj_unregister); 8570441984aSDarrick J. Wong if (sbi->s_chksum_driver) 8580441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 859705895b6SPekka Enberg kfree(sbi->s_blockgroup_lock); 860ac27a0ecSDave Kleikamp kfree(sbi); 861ac27a0ecSDave Kleikamp } 862ac27a0ecSDave Kleikamp 863e18b890bSChristoph Lameter static struct kmem_cache *ext4_inode_cachep; 864ac27a0ecSDave Kleikamp 865ac27a0ecSDave Kleikamp /* 866ac27a0ecSDave Kleikamp * Called inside transaction, so use GFP_NOFS 867ac27a0ecSDave Kleikamp */ 868617ba13bSMingming Cao static struct inode *ext4_alloc_inode(struct super_block *sb) 869ac27a0ecSDave Kleikamp { 870617ba13bSMingming Cao struct ext4_inode_info *ei; 871ac27a0ecSDave Kleikamp 872e6b4f8daSChristoph Lameter ei = kmem_cache_alloc(ext4_inode_cachep, GFP_NOFS); 873ac27a0ecSDave Kleikamp if (!ei) 874ac27a0ecSDave Kleikamp return NULL; 8750b8e58a1SAndreas Dilger 876ac27a0ecSDave Kleikamp ei->vfs_inode.i_version = 1; 877c9de560dSAlex Tomas INIT_LIST_HEAD(&ei->i_prealloc_list); 878c9de560dSAlex Tomas spin_lock_init(&ei->i_prealloc_lock); 8799a26b661SZheng Liu ext4_es_init_tree(&ei->i_es_tree); 8809a26b661SZheng Liu rwlock_init(&ei->i_es_lock); 88174cd15cdSZheng Liu INIT_LIST_HEAD(&ei->i_es_lru); 88274cd15cdSZheng Liu ei->i_es_lru_nr = 0; 883d3922a77SZheng Liu ei->i_touch_when = 0; 884d2a17637SMingming Cao ei->i_reserved_data_blocks = 0; 885d2a17637SMingming Cao ei->i_reserved_meta_blocks = 0; 886d2a17637SMingming Cao ei->i_allocated_meta_blocks = 0; 8879d0be502STheodore Ts'o ei->i_da_metadata_calc_len = 0; 8887e731bc9STheodore Ts'o ei->i_da_metadata_calc_last_lblock = 0; 889d2a17637SMingming Cao spin_lock_init(&(ei->i_block_reservation_lock)); 890a9e7f447SDmitry Monakhov #ifdef CONFIG_QUOTA 891a9e7f447SDmitry Monakhov ei->i_reserved_quota = 0; 892a9e7f447SDmitry Monakhov #endif 8938aefcd55STheodore Ts'o ei->jinode = NULL; 8942e8fa54eSJan Kara INIT_LIST_HEAD(&ei->i_rsv_conversion_list); 895744692dcSJiaying Zhang spin_lock_init(&ei->i_completed_io_lock); 896b436b9beSJan Kara ei->i_sync_tid = 0; 897b436b9beSJan Kara ei->i_datasync_tid = 0; 898f7ad6d2eSTheodore Ts'o atomic_set(&ei->i_ioend_count, 0); 899e27f41e1SDmitry Monakhov atomic_set(&ei->i_unwritten, 0); 9002e8fa54eSJan Kara INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work); 9010b8e58a1SAndreas Dilger 902ac27a0ecSDave Kleikamp return &ei->vfs_inode; 903ac27a0ecSDave Kleikamp } 904ac27a0ecSDave Kleikamp 9057ff9c073STheodore Ts'o static int ext4_drop_inode(struct inode *inode) 9067ff9c073STheodore Ts'o { 9077ff9c073STheodore Ts'o int drop = generic_drop_inode(inode); 9087ff9c073STheodore Ts'o 9097ff9c073STheodore Ts'o trace_ext4_drop_inode(inode, drop); 9107ff9c073STheodore Ts'o return drop; 9117ff9c073STheodore Ts'o } 9127ff9c073STheodore Ts'o 913fa0d7e3dSNick Piggin static void ext4_i_callback(struct rcu_head *head) 914fa0d7e3dSNick Piggin { 915fa0d7e3dSNick Piggin struct inode *inode = container_of(head, struct inode, i_rcu); 916fa0d7e3dSNick Piggin kmem_cache_free(ext4_inode_cachep, EXT4_I(inode)); 917fa0d7e3dSNick Piggin } 918fa0d7e3dSNick Piggin 919617ba13bSMingming Cao static void ext4_destroy_inode(struct inode *inode) 920ac27a0ecSDave Kleikamp { 9219f7dd93dSVasily Averin if (!list_empty(&(EXT4_I(inode)->i_orphan))) { 922b31e1552SEric Sandeen ext4_msg(inode->i_sb, KERN_ERR, 923b31e1552SEric Sandeen "Inode %lu (%p): orphan list check failed!", 924b31e1552SEric Sandeen inode->i_ino, EXT4_I(inode)); 9259f7dd93dSVasily Averin print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS, 16, 4, 9269f7dd93dSVasily Averin EXT4_I(inode), sizeof(struct ext4_inode_info), 9279f7dd93dSVasily Averin true); 9289f7dd93dSVasily Averin dump_stack(); 9299f7dd93dSVasily Averin } 930fa0d7e3dSNick Piggin call_rcu(&inode->i_rcu, ext4_i_callback); 931ac27a0ecSDave Kleikamp } 932ac27a0ecSDave Kleikamp 93351cc5068SAlexey Dobriyan static void init_once(void *foo) 934ac27a0ecSDave Kleikamp { 935617ba13bSMingming Cao struct ext4_inode_info *ei = (struct ext4_inode_info *) foo; 936ac27a0ecSDave Kleikamp 937ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&ei->i_orphan); 938ac27a0ecSDave Kleikamp init_rwsem(&ei->xattr_sem); 9390e855ac8SAneesh Kumar K.V init_rwsem(&ei->i_data_sem); 940ac27a0ecSDave Kleikamp inode_init_once(&ei->vfs_inode); 941ac27a0ecSDave Kleikamp } 942ac27a0ecSDave Kleikamp 943ac27a0ecSDave Kleikamp static int init_inodecache(void) 944ac27a0ecSDave Kleikamp { 945617ba13bSMingming Cao ext4_inode_cachep = kmem_cache_create("ext4_inode_cache", 946617ba13bSMingming Cao sizeof(struct ext4_inode_info), 947ac27a0ecSDave Kleikamp 0, (SLAB_RECLAIM_ACCOUNT| 948ac27a0ecSDave Kleikamp SLAB_MEM_SPREAD), 94920c2df83SPaul Mundt init_once); 950617ba13bSMingming Cao if (ext4_inode_cachep == NULL) 951ac27a0ecSDave Kleikamp return -ENOMEM; 952ac27a0ecSDave Kleikamp return 0; 953ac27a0ecSDave Kleikamp } 954ac27a0ecSDave Kleikamp 955ac27a0ecSDave Kleikamp static void destroy_inodecache(void) 956ac27a0ecSDave Kleikamp { 9578c0a8537SKirill A. Shutemov /* 9588c0a8537SKirill A. Shutemov * Make sure all delayed rcu free inodes are flushed before we 9598c0a8537SKirill A. Shutemov * destroy cache. 9608c0a8537SKirill A. Shutemov */ 9618c0a8537SKirill A. Shutemov rcu_barrier(); 962617ba13bSMingming Cao kmem_cache_destroy(ext4_inode_cachep); 963ac27a0ecSDave Kleikamp } 964ac27a0ecSDave Kleikamp 9650930fcc1SAl Viro void ext4_clear_inode(struct inode *inode) 966ac27a0ecSDave Kleikamp { 9670930fcc1SAl Viro invalidate_inode_buffers(inode); 968dbd5768fSJan Kara clear_inode(inode); 9699f754758SChristoph Hellwig dquot_drop(inode); 970c2ea3fdeSTheodore Ts'o ext4_discard_preallocations(inode); 97151865fdaSZheng Liu ext4_es_remove_extent(inode, 0, EXT_MAX_BLOCKS); 97274cd15cdSZheng Liu ext4_es_lru_del(inode); 9738aefcd55STheodore Ts'o if (EXT4_I(inode)->jinode) { 9748aefcd55STheodore Ts'o jbd2_journal_release_jbd_inode(EXT4_JOURNAL(inode), 9758aefcd55STheodore Ts'o EXT4_I(inode)->jinode); 9768aefcd55STheodore Ts'o jbd2_free_inode(EXT4_I(inode)->jinode); 9778aefcd55STheodore Ts'o EXT4_I(inode)->jinode = NULL; 9788aefcd55STheodore Ts'o } 979ac27a0ecSDave Kleikamp } 980ac27a0ecSDave Kleikamp 9811b961ac0SChristoph Hellwig static struct inode *ext4_nfs_get_inode(struct super_block *sb, 9821b961ac0SChristoph Hellwig u64 ino, u32 generation) 983ac27a0ecSDave Kleikamp { 984ac27a0ecSDave Kleikamp struct inode *inode; 985ac27a0ecSDave Kleikamp 986617ba13bSMingming Cao if (ino < EXT4_FIRST_INO(sb) && ino != EXT4_ROOT_INO) 987ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 988617ba13bSMingming Cao if (ino > le32_to_cpu(EXT4_SB(sb)->s_es->s_inodes_count)) 989ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 990ac27a0ecSDave Kleikamp 991ac27a0ecSDave Kleikamp /* iget isn't really right if the inode is currently unallocated!! 992ac27a0ecSDave Kleikamp * 993617ba13bSMingming Cao * ext4_read_inode will return a bad_inode if the inode had been 994ac27a0ecSDave Kleikamp * deleted, so we should be safe. 995ac27a0ecSDave Kleikamp * 996ac27a0ecSDave Kleikamp * Currently we don't know the generation for parent directory, so 997ac27a0ecSDave Kleikamp * a generation of 0 means "accept any" 998ac27a0ecSDave Kleikamp */ 9991d1fe1eeSDavid Howells inode = ext4_iget(sb, ino); 10001d1fe1eeSDavid Howells if (IS_ERR(inode)) 10011d1fe1eeSDavid Howells return ERR_CAST(inode); 10021d1fe1eeSDavid Howells if (generation && inode->i_generation != generation) { 1003ac27a0ecSDave Kleikamp iput(inode); 1004ac27a0ecSDave Kleikamp return ERR_PTR(-ESTALE); 1005ac27a0ecSDave Kleikamp } 10061b961ac0SChristoph Hellwig 10071b961ac0SChristoph Hellwig return inode; 1008ac27a0ecSDave Kleikamp } 10091b961ac0SChristoph Hellwig 10101b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_dentry(struct super_block *sb, struct fid *fid, 10111b961ac0SChristoph Hellwig int fh_len, int fh_type) 10121b961ac0SChristoph Hellwig { 10131b961ac0SChristoph Hellwig return generic_fh_to_dentry(sb, fid, fh_len, fh_type, 10141b961ac0SChristoph Hellwig ext4_nfs_get_inode); 10151b961ac0SChristoph Hellwig } 10161b961ac0SChristoph Hellwig 10171b961ac0SChristoph Hellwig static struct dentry *ext4_fh_to_parent(struct super_block *sb, struct fid *fid, 10181b961ac0SChristoph Hellwig int fh_len, int fh_type) 10191b961ac0SChristoph Hellwig { 10201b961ac0SChristoph Hellwig return generic_fh_to_parent(sb, fid, fh_len, fh_type, 10211b961ac0SChristoph Hellwig ext4_nfs_get_inode); 1022ac27a0ecSDave Kleikamp } 1023ac27a0ecSDave Kleikamp 1024c39a7f84SToshiyuki Okajima /* 1025c39a7f84SToshiyuki Okajima * Try to release metadata pages (indirect blocks, directories) which are 1026c39a7f84SToshiyuki Okajima * mapped via the block device. Since these pages could have journal heads 1027c39a7f84SToshiyuki Okajima * which would prevent try_to_free_buffers() from freeing them, we must use 1028c39a7f84SToshiyuki Okajima * jbd2 layer's try_to_free_buffers() function to release them. 1029c39a7f84SToshiyuki Okajima */ 10300b8e58a1SAndreas Dilger static int bdev_try_to_free_page(struct super_block *sb, struct page *page, 10310b8e58a1SAndreas Dilger gfp_t wait) 1032c39a7f84SToshiyuki Okajima { 1033c39a7f84SToshiyuki Okajima journal_t *journal = EXT4_SB(sb)->s_journal; 1034c39a7f84SToshiyuki Okajima 1035c39a7f84SToshiyuki Okajima WARN_ON(PageChecked(page)); 1036c39a7f84SToshiyuki Okajima if (!page_has_buffers(page)) 1037c39a7f84SToshiyuki Okajima return 0; 1038c39a7f84SToshiyuki Okajima if (journal) 1039c39a7f84SToshiyuki Okajima return jbd2_journal_try_to_free_buffers(journal, page, 1040c39a7f84SToshiyuki Okajima wait & ~__GFP_WAIT); 1041c39a7f84SToshiyuki Okajima return try_to_free_buffers(page); 1042c39a7f84SToshiyuki Okajima } 1043c39a7f84SToshiyuki Okajima 1044ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1045ac27a0ecSDave Kleikamp #define QTYPE2NAME(t) ((t) == USRQUOTA ? "user" : "group") 1046ac27a0ecSDave Kleikamp #define QTYPE2MOPT(on, t) ((t) == USRQUOTA?((on)##USRJQUOTA):((on)##GRPJQUOTA)) 1047ac27a0ecSDave Kleikamp 1048617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot); 1049617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot); 1050617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot); 1051617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot); 1052617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type); 10536f28e087SJan Kara static int ext4_quota_on(struct super_block *sb, int type, int format_id, 1054f00c9e44SJan Kara struct path *path); 10557c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 10567c319d32SAditya Kali int format_id); 1057ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type); 10587c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type); 1059617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type); 1060617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 1061ac27a0ecSDave Kleikamp size_t len, loff_t off); 1062617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 1063ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off); 10647c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 10657c319d32SAditya Kali unsigned int flags); 10667c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb); 1067ac27a0ecSDave Kleikamp 106861e225dcSAlexey Dobriyan static const struct dquot_operations ext4_quota_operations = { 106960e58e0fSMingming Cao .get_reserved_space = ext4_get_reserved_space, 1070617ba13bSMingming Cao .write_dquot = ext4_write_dquot, 1071617ba13bSMingming Cao .acquire_dquot = ext4_acquire_dquot, 1072617ba13bSMingming Cao .release_dquot = ext4_release_dquot, 1073617ba13bSMingming Cao .mark_dirty = ext4_mark_dquot_dirty, 1074a5b5ee32SJan Kara .write_info = ext4_write_info, 1075a5b5ee32SJan Kara .alloc_dquot = dquot_alloc, 1076a5b5ee32SJan Kara .destroy_dquot = dquot_destroy, 1077ac27a0ecSDave Kleikamp }; 1078ac27a0ecSDave Kleikamp 10790d54b217SAlexey Dobriyan static const struct quotactl_ops ext4_qctl_operations = { 1080617ba13bSMingming Cao .quota_on = ext4_quota_on, 1081ca0e05e4SDmitry Monakhov .quota_off = ext4_quota_off, 1082287a8095SChristoph Hellwig .quota_sync = dquot_quota_sync, 1083287a8095SChristoph Hellwig .get_info = dquot_get_dqinfo, 1084287a8095SChristoph Hellwig .set_info = dquot_set_dqinfo, 1085287a8095SChristoph Hellwig .get_dqblk = dquot_get_dqblk, 1086287a8095SChristoph Hellwig .set_dqblk = dquot_set_dqblk 1087ac27a0ecSDave Kleikamp }; 10887c319d32SAditya Kali 10897c319d32SAditya Kali static const struct quotactl_ops ext4_qctl_sysfile_operations = { 10907c319d32SAditya Kali .quota_on_meta = ext4_quota_on_sysfile, 10917c319d32SAditya Kali .quota_off = ext4_quota_off_sysfile, 10927c319d32SAditya Kali .quota_sync = dquot_quota_sync, 10937c319d32SAditya Kali .get_info = dquot_get_dqinfo, 10947c319d32SAditya Kali .set_info = dquot_set_dqinfo, 10957c319d32SAditya Kali .get_dqblk = dquot_get_dqblk, 10967c319d32SAditya Kali .set_dqblk = dquot_set_dqblk 10977c319d32SAditya Kali }; 1098ac27a0ecSDave Kleikamp #endif 1099ac27a0ecSDave Kleikamp 1100ee9b6d61SJosef 'Jeff' Sipek static const struct super_operations ext4_sops = { 1101617ba13bSMingming Cao .alloc_inode = ext4_alloc_inode, 1102617ba13bSMingming Cao .destroy_inode = ext4_destroy_inode, 1103617ba13bSMingming Cao .write_inode = ext4_write_inode, 1104617ba13bSMingming Cao .dirty_inode = ext4_dirty_inode, 11057ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11060930fcc1SAl Viro .evict_inode = ext4_evict_inode, 1107617ba13bSMingming Cao .put_super = ext4_put_super, 1108617ba13bSMingming Cao .sync_fs = ext4_sync_fs, 1109c4be0c1dSTakashi Sato .freeze_fs = ext4_freeze, 1110c4be0c1dSTakashi Sato .unfreeze_fs = ext4_unfreeze, 1111617ba13bSMingming Cao .statfs = ext4_statfs, 1112617ba13bSMingming Cao .remount_fs = ext4_remount, 1113617ba13bSMingming Cao .show_options = ext4_show_options, 1114ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1115617ba13bSMingming Cao .quota_read = ext4_quota_read, 1116617ba13bSMingming Cao .quota_write = ext4_quota_write, 1117ac27a0ecSDave Kleikamp #endif 1118c39a7f84SToshiyuki Okajima .bdev_try_to_free_page = bdev_try_to_free_page, 1119ac27a0ecSDave Kleikamp }; 1120ac27a0ecSDave Kleikamp 11219ca92389STheodore Ts'o static const struct super_operations ext4_nojournal_sops = { 11229ca92389STheodore Ts'o .alloc_inode = ext4_alloc_inode, 11239ca92389STheodore Ts'o .destroy_inode = ext4_destroy_inode, 11249ca92389STheodore Ts'o .write_inode = ext4_write_inode, 11259ca92389STheodore Ts'o .dirty_inode = ext4_dirty_inode, 11267ff9c073STheodore Ts'o .drop_inode = ext4_drop_inode, 11270930fcc1SAl Viro .evict_inode = ext4_evict_inode, 112806a407f1SDmitry Monakhov .sync_fs = ext4_sync_fs_nojournal, 11299ca92389STheodore Ts'o .put_super = ext4_put_super, 11309ca92389STheodore Ts'o .statfs = ext4_statfs, 11319ca92389STheodore Ts'o .remount_fs = ext4_remount, 11329ca92389STheodore Ts'o .show_options = ext4_show_options, 11339ca92389STheodore Ts'o #ifdef CONFIG_QUOTA 11349ca92389STheodore Ts'o .quota_read = ext4_quota_read, 11359ca92389STheodore Ts'o .quota_write = ext4_quota_write, 11369ca92389STheodore Ts'o #endif 11379ca92389STheodore Ts'o .bdev_try_to_free_page = bdev_try_to_free_page, 11389ca92389STheodore Ts'o }; 11399ca92389STheodore Ts'o 114039655164SChristoph Hellwig static const struct export_operations ext4_export_ops = { 11411b961ac0SChristoph Hellwig .fh_to_dentry = ext4_fh_to_dentry, 11421b961ac0SChristoph Hellwig .fh_to_parent = ext4_fh_to_parent, 1143617ba13bSMingming Cao .get_parent = ext4_get_parent, 1144ac27a0ecSDave Kleikamp }; 1145ac27a0ecSDave Kleikamp 1146ac27a0ecSDave Kleikamp enum { 1147ac27a0ecSDave Kleikamp Opt_bsd_df, Opt_minix_df, Opt_grpid, Opt_nogrpid, 1148ac27a0ecSDave Kleikamp Opt_resgid, Opt_resuid, Opt_sb, Opt_err_cont, Opt_err_panic, Opt_err_ro, 114972578c33STheodore Ts'o Opt_nouid32, Opt_debug, Opt_removed, 1150ac27a0ecSDave Kleikamp Opt_user_xattr, Opt_nouser_xattr, Opt_acl, Opt_noacl, 115172578c33STheodore Ts'o Opt_auto_da_alloc, Opt_noauto_da_alloc, Opt_noload, 1152ad4eec61SEric Sandeen Opt_commit, Opt_min_batch_time, Opt_max_batch_time, Opt_journal_dev, 1153ad4eec61SEric Sandeen Opt_journal_path, Opt_journal_checksum, Opt_journal_async_commit, 1154ac27a0ecSDave Kleikamp Opt_abort, Opt_data_journal, Opt_data_ordered, Opt_data_writeback, 1155296c355cSTheodore Ts'o Opt_data_err_abort, Opt_data_err_ignore, 1156ac27a0ecSDave Kleikamp Opt_usrjquota, Opt_grpjquota, Opt_offusrjquota, Opt_offgrpjquota, 11575a20bdfcSJan Kara Opt_jqfmt_vfsold, Opt_jqfmt_vfsv0, Opt_jqfmt_vfsv1, Opt_quota, 1158ee4a3fcdSTheodore Ts'o Opt_noquota, Opt_barrier, Opt_nobarrier, Opt_err, 1159661aa520SEric Sandeen Opt_usrquota, Opt_grpquota, Opt_i_version, 11601449032bSTheodore Ts'o Opt_stripe, Opt_delalloc, Opt_nodelalloc, Opt_mblk_io_submit, 11611449032bSTheodore Ts'o Opt_nomblk_io_submit, Opt_block_validity, Opt_noblock_validity, 11625328e635SEric Sandeen Opt_inode_readahead_blks, Opt_journal_ioprio, 1163744692dcSJiaying Zhang Opt_dioread_nolock, Opt_dioread_lock, 1164fc6cb1cdSTheodore Ts'o Opt_discard, Opt_nodiscard, Opt_init_itable, Opt_noinit_itable, 1165df981d03STheodore Ts'o Opt_max_dir_size_kb, 1166ac27a0ecSDave Kleikamp }; 1167ac27a0ecSDave Kleikamp 1168a447c093SSteven Whitehouse static const match_table_t tokens = { 1169ac27a0ecSDave Kleikamp {Opt_bsd_df, "bsddf"}, 1170ac27a0ecSDave Kleikamp {Opt_minix_df, "minixdf"}, 1171ac27a0ecSDave Kleikamp {Opt_grpid, "grpid"}, 1172ac27a0ecSDave Kleikamp {Opt_grpid, "bsdgroups"}, 1173ac27a0ecSDave Kleikamp {Opt_nogrpid, "nogrpid"}, 1174ac27a0ecSDave Kleikamp {Opt_nogrpid, "sysvgroups"}, 1175ac27a0ecSDave Kleikamp {Opt_resgid, "resgid=%u"}, 1176ac27a0ecSDave Kleikamp {Opt_resuid, "resuid=%u"}, 1177ac27a0ecSDave Kleikamp {Opt_sb, "sb=%u"}, 1178ac27a0ecSDave Kleikamp {Opt_err_cont, "errors=continue"}, 1179ac27a0ecSDave Kleikamp {Opt_err_panic, "errors=panic"}, 1180ac27a0ecSDave Kleikamp {Opt_err_ro, "errors=remount-ro"}, 1181ac27a0ecSDave Kleikamp {Opt_nouid32, "nouid32"}, 1182ac27a0ecSDave Kleikamp {Opt_debug, "debug"}, 118372578c33STheodore Ts'o {Opt_removed, "oldalloc"}, 118472578c33STheodore Ts'o {Opt_removed, "orlov"}, 1185ac27a0ecSDave Kleikamp {Opt_user_xattr, "user_xattr"}, 1186ac27a0ecSDave Kleikamp {Opt_nouser_xattr, "nouser_xattr"}, 1187ac27a0ecSDave Kleikamp {Opt_acl, "acl"}, 1188ac27a0ecSDave Kleikamp {Opt_noacl, "noacl"}, 1189e3bb52aeSEric Sandeen {Opt_noload, "norecovery"}, 11905a916be1STheodore Ts'o {Opt_noload, "noload"}, 119172578c33STheodore Ts'o {Opt_removed, "nobh"}, 119272578c33STheodore Ts'o {Opt_removed, "bh"}, 1193ac27a0ecSDave Kleikamp {Opt_commit, "commit=%u"}, 119430773840STheodore Ts'o {Opt_min_batch_time, "min_batch_time=%u"}, 119530773840STheodore Ts'o {Opt_max_batch_time, "max_batch_time=%u"}, 1196ac27a0ecSDave Kleikamp {Opt_journal_dev, "journal_dev=%u"}, 1197ad4eec61SEric Sandeen {Opt_journal_path, "journal_path=%s"}, 1198818d276cSGirish Shilamkar {Opt_journal_checksum, "journal_checksum"}, 1199818d276cSGirish Shilamkar {Opt_journal_async_commit, "journal_async_commit"}, 1200ac27a0ecSDave Kleikamp {Opt_abort, "abort"}, 1201ac27a0ecSDave Kleikamp {Opt_data_journal, "data=journal"}, 1202ac27a0ecSDave Kleikamp {Opt_data_ordered, "data=ordered"}, 1203ac27a0ecSDave Kleikamp {Opt_data_writeback, "data=writeback"}, 12045bf5683aSHidehiro Kawai {Opt_data_err_abort, "data_err=abort"}, 12055bf5683aSHidehiro Kawai {Opt_data_err_ignore, "data_err=ignore"}, 1206ac27a0ecSDave Kleikamp {Opt_offusrjquota, "usrjquota="}, 1207ac27a0ecSDave Kleikamp {Opt_usrjquota, "usrjquota=%s"}, 1208ac27a0ecSDave Kleikamp {Opt_offgrpjquota, "grpjquota="}, 1209ac27a0ecSDave Kleikamp {Opt_grpjquota, "grpjquota=%s"}, 1210ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsold, "jqfmt=vfsold"}, 1211ac27a0ecSDave Kleikamp {Opt_jqfmt_vfsv0, "jqfmt=vfsv0"}, 12125a20bdfcSJan Kara {Opt_jqfmt_vfsv1, "jqfmt=vfsv1"}, 1213ac27a0ecSDave Kleikamp {Opt_grpquota, "grpquota"}, 1214ac27a0ecSDave Kleikamp {Opt_noquota, "noquota"}, 1215ac27a0ecSDave Kleikamp {Opt_quota, "quota"}, 1216ac27a0ecSDave Kleikamp {Opt_usrquota, "usrquota"}, 1217ac27a0ecSDave Kleikamp {Opt_barrier, "barrier=%u"}, 121806705bffSTheodore Ts'o {Opt_barrier, "barrier"}, 121906705bffSTheodore Ts'o {Opt_nobarrier, "nobarrier"}, 122025ec56b5SJean Noel Cordenner {Opt_i_version, "i_version"}, 1221c9de560dSAlex Tomas {Opt_stripe, "stripe=%u"}, 122264769240SAlex Tomas {Opt_delalloc, "delalloc"}, 1223dd919b98SAneesh Kumar K.V {Opt_nodelalloc, "nodelalloc"}, 122436ade451SJan Kara {Opt_removed, "mblk_io_submit"}, 122536ade451SJan Kara {Opt_removed, "nomblk_io_submit"}, 12266fd058f7STheodore Ts'o {Opt_block_validity, "block_validity"}, 12276fd058f7STheodore Ts'o {Opt_noblock_validity, "noblock_validity"}, 1228240799cdSTheodore Ts'o {Opt_inode_readahead_blks, "inode_readahead_blks=%u"}, 1229b3881f74STheodore Ts'o {Opt_journal_ioprio, "journal_ioprio=%u"}, 1230afd4672dSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc=%u"}, 123106705bffSTheodore Ts'o {Opt_auto_da_alloc, "auto_da_alloc"}, 123206705bffSTheodore Ts'o {Opt_noauto_da_alloc, "noauto_da_alloc"}, 1233744692dcSJiaying Zhang {Opt_dioread_nolock, "dioread_nolock"}, 1234744692dcSJiaying Zhang {Opt_dioread_lock, "dioread_lock"}, 12355328e635SEric Sandeen {Opt_discard, "discard"}, 12365328e635SEric Sandeen {Opt_nodiscard, "nodiscard"}, 1237fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable=%u"}, 1238fc6cb1cdSTheodore Ts'o {Opt_init_itable, "init_itable"}, 1239fc6cb1cdSTheodore Ts'o {Opt_noinit_itable, "noinit_itable"}, 1240df981d03STheodore Ts'o {Opt_max_dir_size_kb, "max_dir_size_kb=%u"}, 1241c7198b9cSTheodore Ts'o {Opt_removed, "check=none"}, /* mount option from ext2/3 */ 1242c7198b9cSTheodore Ts'o {Opt_removed, "nocheck"}, /* mount option from ext2/3 */ 1243c7198b9cSTheodore Ts'o {Opt_removed, "reservation"}, /* mount option from ext2/3 */ 1244c7198b9cSTheodore Ts'o {Opt_removed, "noreservation"}, /* mount option from ext2/3 */ 1245c7198b9cSTheodore Ts'o {Opt_removed, "journal=%u"}, /* mount option from ext2/3 */ 1246f3f12faaSJosef Bacik {Opt_err, NULL}, 1247ac27a0ecSDave Kleikamp }; 1248ac27a0ecSDave Kleikamp 1249617ba13bSMingming Cao static ext4_fsblk_t get_sb_block(void **data) 1250ac27a0ecSDave Kleikamp { 1251617ba13bSMingming Cao ext4_fsblk_t sb_block; 1252ac27a0ecSDave Kleikamp char *options = (char *) *data; 1253ac27a0ecSDave Kleikamp 1254ac27a0ecSDave Kleikamp if (!options || strncmp(options, "sb=", 3) != 0) 1255ac27a0ecSDave Kleikamp return 1; /* Default location */ 12560b8e58a1SAndreas Dilger 1257ac27a0ecSDave Kleikamp options += 3; 12580b8e58a1SAndreas Dilger /* TODO: use simple_strtoll with >32bit ext4 */ 1259ac27a0ecSDave Kleikamp sb_block = simple_strtoul(options, &options, 0); 1260ac27a0ecSDave Kleikamp if (*options && *options != ',') { 12614776004fSTheodore Ts'o printk(KERN_ERR "EXT4-fs: Invalid sb specification: %s\n", 1262ac27a0ecSDave Kleikamp (char *) *data); 1263ac27a0ecSDave Kleikamp return 1; 1264ac27a0ecSDave Kleikamp } 1265ac27a0ecSDave Kleikamp if (*options == ',') 1266ac27a0ecSDave Kleikamp options++; 1267ac27a0ecSDave Kleikamp *data = (void *) options; 12680b8e58a1SAndreas Dilger 1269ac27a0ecSDave Kleikamp return sb_block; 1270ac27a0ecSDave Kleikamp } 1271ac27a0ecSDave Kleikamp 1272b3881f74STheodore Ts'o #define DEFAULT_JOURNAL_IOPRIO (IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, 3)) 1273437ca0fdSDmitry Monakhov static char deprecated_msg[] = "Mount option \"%s\" will be removed by %s\n" 1274437ca0fdSDmitry Monakhov "Contact linux-ext4@vger.kernel.org if you think we should keep it.\n"; 1275b3881f74STheodore Ts'o 127656c50f11SDmitry Monakhov #ifdef CONFIG_QUOTA 127756c50f11SDmitry Monakhov static int set_qf_name(struct super_block *sb, int qtype, substring_t *args) 127856c50f11SDmitry Monakhov { 127956c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 128056c50f11SDmitry Monakhov char *qname; 128103dafb5fSChen Gang int ret = -1; 128256c50f11SDmitry Monakhov 128356c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 128456c50f11SDmitry Monakhov !sbi->s_qf_names[qtype]) { 128556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 128656c50f11SDmitry Monakhov "Cannot change journaled " 128756c50f11SDmitry Monakhov "quota options when quota turned on"); 128857f73c2cSTheodore Ts'o return -1; 128956c50f11SDmitry Monakhov } 1290262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1291262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set journaled quota options " 1292262b4662SJan Kara "when QUOTA feature is enabled"); 1293262b4662SJan Kara return -1; 1294262b4662SJan Kara } 129556c50f11SDmitry Monakhov qname = match_strdup(args); 129656c50f11SDmitry Monakhov if (!qname) { 129756c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 129856c50f11SDmitry Monakhov "Not enough memory for storing quotafile name"); 129957f73c2cSTheodore Ts'o return -1; 130056c50f11SDmitry Monakhov } 130103dafb5fSChen Gang if (sbi->s_qf_names[qtype]) { 130203dafb5fSChen Gang if (strcmp(sbi->s_qf_names[qtype], qname) == 0) 130303dafb5fSChen Gang ret = 1; 130403dafb5fSChen Gang else 130556c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 130603dafb5fSChen Gang "%s quota file already specified", 130703dafb5fSChen Gang QTYPE2NAME(qtype)); 130803dafb5fSChen Gang goto errout; 130956c50f11SDmitry Monakhov } 131003dafb5fSChen Gang if (strchr(qname, '/')) { 131156c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, 131256c50f11SDmitry Monakhov "quotafile must be on filesystem root"); 131303dafb5fSChen Gang goto errout; 131456c50f11SDmitry Monakhov } 131503dafb5fSChen Gang sbi->s_qf_names[qtype] = qname; 1316fd8c37ecSTheodore Ts'o set_opt(sb, QUOTA); 131756c50f11SDmitry Monakhov return 1; 131803dafb5fSChen Gang errout: 131903dafb5fSChen Gang kfree(qname); 132003dafb5fSChen Gang return ret; 132156c50f11SDmitry Monakhov } 132256c50f11SDmitry Monakhov 132356c50f11SDmitry Monakhov static int clear_qf_name(struct super_block *sb, int qtype) 132456c50f11SDmitry Monakhov { 132556c50f11SDmitry Monakhov 132656c50f11SDmitry Monakhov struct ext4_sb_info *sbi = EXT4_SB(sb); 132756c50f11SDmitry Monakhov 132856c50f11SDmitry Monakhov if (sb_any_quota_loaded(sb) && 132956c50f11SDmitry Monakhov sbi->s_qf_names[qtype]) { 133056c50f11SDmitry Monakhov ext4_msg(sb, KERN_ERR, "Cannot change journaled quota options" 133156c50f11SDmitry Monakhov " when quota turned on"); 133257f73c2cSTheodore Ts'o return -1; 133356c50f11SDmitry Monakhov } 133403dafb5fSChen Gang kfree(sbi->s_qf_names[qtype]); 133556c50f11SDmitry Monakhov sbi->s_qf_names[qtype] = NULL; 133656c50f11SDmitry Monakhov return 1; 133756c50f11SDmitry Monakhov } 133856c50f11SDmitry Monakhov #endif 133956c50f11SDmitry Monakhov 134026092bf5STheodore Ts'o #define MOPT_SET 0x0001 134126092bf5STheodore Ts'o #define MOPT_CLEAR 0x0002 134226092bf5STheodore Ts'o #define MOPT_NOSUPPORT 0x0004 134326092bf5STheodore Ts'o #define MOPT_EXPLICIT 0x0008 134426092bf5STheodore Ts'o #define MOPT_CLEAR_ERR 0x0010 134526092bf5STheodore Ts'o #define MOPT_GTE0 0x0020 134626092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 134726092bf5STheodore Ts'o #define MOPT_Q 0 134826092bf5STheodore Ts'o #define MOPT_QFMT 0x0040 134926092bf5STheodore Ts'o #else 135026092bf5STheodore Ts'o #define MOPT_Q MOPT_NOSUPPORT 135126092bf5STheodore Ts'o #define MOPT_QFMT MOPT_NOSUPPORT 135226092bf5STheodore Ts'o #endif 135326092bf5STheodore Ts'o #define MOPT_DATAJ 0x0080 13548dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT2 0x0100 13558dc0aa8cSTheodore Ts'o #define MOPT_NO_EXT3 0x0200 13568dc0aa8cSTheodore Ts'o #define MOPT_EXT4_ONLY (MOPT_NO_EXT2 | MOPT_NO_EXT3) 1357ad4eec61SEric Sandeen #define MOPT_STRING 0x0400 135826092bf5STheodore Ts'o 135926092bf5STheodore Ts'o static const struct mount_opts { 136026092bf5STheodore Ts'o int token; 136126092bf5STheodore Ts'o int mount_opt; 136226092bf5STheodore Ts'o int flags; 136326092bf5STheodore Ts'o } ext4_mount_opts[] = { 136426092bf5STheodore Ts'o {Opt_minix_df, EXT4_MOUNT_MINIX_DF, MOPT_SET}, 136526092bf5STheodore Ts'o {Opt_bsd_df, EXT4_MOUNT_MINIX_DF, MOPT_CLEAR}, 136626092bf5STheodore Ts'o {Opt_grpid, EXT4_MOUNT_GRPID, MOPT_SET}, 136726092bf5STheodore Ts'o {Opt_nogrpid, EXT4_MOUNT_GRPID, MOPT_CLEAR}, 136826092bf5STheodore Ts'o {Opt_block_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_SET}, 136926092bf5STheodore Ts'o {Opt_noblock_validity, EXT4_MOUNT_BLOCK_VALIDITY, MOPT_CLEAR}, 13708dc0aa8cSTheodore Ts'o {Opt_dioread_nolock, EXT4_MOUNT_DIOREAD_NOLOCK, 13718dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13728dc0aa8cSTheodore Ts'o {Opt_dioread_lock, EXT4_MOUNT_DIOREAD_NOLOCK, 13738dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 137426092bf5STheodore Ts'o {Opt_discard, EXT4_MOUNT_DISCARD, MOPT_SET}, 137526092bf5STheodore Ts'o {Opt_nodiscard, EXT4_MOUNT_DISCARD, MOPT_CLEAR}, 13768dc0aa8cSTheodore Ts'o {Opt_delalloc, EXT4_MOUNT_DELALLOC, 13778dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET | MOPT_EXPLICIT}, 13788dc0aa8cSTheodore Ts'o {Opt_nodelalloc, EXT4_MOUNT_DELALLOC, 137959d9fa5cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_CLEAR}, 13808dc0aa8cSTheodore Ts'o {Opt_journal_checksum, EXT4_MOUNT_JOURNAL_CHECKSUM, 13818dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 138226092bf5STheodore Ts'o {Opt_journal_async_commit, (EXT4_MOUNT_JOURNAL_ASYNC_COMMIT | 13838dc0aa8cSTheodore Ts'o EXT4_MOUNT_JOURNAL_CHECKSUM), 13848dc0aa8cSTheodore Ts'o MOPT_EXT4_ONLY | MOPT_SET}, 13858dc0aa8cSTheodore Ts'o {Opt_noload, EXT4_MOUNT_NOLOAD, MOPT_NO_EXT2 | MOPT_SET}, 138626092bf5STheodore Ts'o {Opt_err_panic, EXT4_MOUNT_ERRORS_PANIC, MOPT_SET | MOPT_CLEAR_ERR}, 138726092bf5STheodore Ts'o {Opt_err_ro, EXT4_MOUNT_ERRORS_RO, MOPT_SET | MOPT_CLEAR_ERR}, 138826092bf5STheodore Ts'o {Opt_err_cont, EXT4_MOUNT_ERRORS_CONT, MOPT_SET | MOPT_CLEAR_ERR}, 13898dc0aa8cSTheodore Ts'o {Opt_data_err_abort, EXT4_MOUNT_DATA_ERR_ABORT, 13908dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_SET}, 13918dc0aa8cSTheodore Ts'o {Opt_data_err_ignore, EXT4_MOUNT_DATA_ERR_ABORT, 13928dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_CLEAR}, 139326092bf5STheodore Ts'o {Opt_barrier, EXT4_MOUNT_BARRIER, MOPT_SET}, 139426092bf5STheodore Ts'o {Opt_nobarrier, EXT4_MOUNT_BARRIER, MOPT_CLEAR}, 139526092bf5STheodore Ts'o {Opt_noauto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_SET}, 139626092bf5STheodore Ts'o {Opt_auto_da_alloc, EXT4_MOUNT_NO_AUTO_DA_ALLOC, MOPT_CLEAR}, 139726092bf5STheodore Ts'o {Opt_noinit_itable, EXT4_MOUNT_INIT_INODE_TABLE, MOPT_CLEAR}, 139826092bf5STheodore Ts'o {Opt_commit, 0, MOPT_GTE0}, 139926092bf5STheodore Ts'o {Opt_max_batch_time, 0, MOPT_GTE0}, 140026092bf5STheodore Ts'o {Opt_min_batch_time, 0, MOPT_GTE0}, 140126092bf5STheodore Ts'o {Opt_inode_readahead_blks, 0, MOPT_GTE0}, 140226092bf5STheodore Ts'o {Opt_init_itable, 0, MOPT_GTE0}, 140326092bf5STheodore Ts'o {Opt_stripe, 0, MOPT_GTE0}, 14040efb3b23SJan Kara {Opt_resuid, 0, MOPT_GTE0}, 14050efb3b23SJan Kara {Opt_resgid, 0, MOPT_GTE0}, 14060efb3b23SJan Kara {Opt_journal_dev, 0, MOPT_GTE0}, 1407ad4eec61SEric Sandeen {Opt_journal_path, 0, MOPT_STRING}, 14080efb3b23SJan Kara {Opt_journal_ioprio, 0, MOPT_GTE0}, 14098dc0aa8cSTheodore Ts'o {Opt_data_journal, EXT4_MOUNT_JOURNAL_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 14108dc0aa8cSTheodore Ts'o {Opt_data_ordered, EXT4_MOUNT_ORDERED_DATA, MOPT_NO_EXT2 | MOPT_DATAJ}, 14118dc0aa8cSTheodore Ts'o {Opt_data_writeback, EXT4_MOUNT_WRITEBACK_DATA, 14128dc0aa8cSTheodore Ts'o MOPT_NO_EXT2 | MOPT_DATAJ}, 141326092bf5STheodore Ts'o {Opt_user_xattr, EXT4_MOUNT_XATTR_USER, MOPT_SET}, 141426092bf5STheodore Ts'o {Opt_nouser_xattr, EXT4_MOUNT_XATTR_USER, MOPT_CLEAR}, 141526092bf5STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 141626092bf5STheodore Ts'o {Opt_acl, EXT4_MOUNT_POSIX_ACL, MOPT_SET}, 141726092bf5STheodore Ts'o {Opt_noacl, EXT4_MOUNT_POSIX_ACL, MOPT_CLEAR}, 141826092bf5STheodore Ts'o #else 141926092bf5STheodore Ts'o {Opt_acl, 0, MOPT_NOSUPPORT}, 142026092bf5STheodore Ts'o {Opt_noacl, 0, MOPT_NOSUPPORT}, 142126092bf5STheodore Ts'o #endif 142226092bf5STheodore Ts'o {Opt_nouid32, EXT4_MOUNT_NO_UID32, MOPT_SET}, 142326092bf5STheodore Ts'o {Opt_debug, EXT4_MOUNT_DEBUG, MOPT_SET}, 142426092bf5STheodore Ts'o {Opt_quota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, MOPT_SET | MOPT_Q}, 142526092bf5STheodore Ts'o {Opt_usrquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA, 142626092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 142726092bf5STheodore Ts'o {Opt_grpquota, EXT4_MOUNT_QUOTA | EXT4_MOUNT_GRPQUOTA, 142826092bf5STheodore Ts'o MOPT_SET | MOPT_Q}, 142926092bf5STheodore Ts'o {Opt_noquota, (EXT4_MOUNT_QUOTA | EXT4_MOUNT_USRQUOTA | 143026092bf5STheodore Ts'o EXT4_MOUNT_GRPQUOTA), MOPT_CLEAR | MOPT_Q}, 143126092bf5STheodore Ts'o {Opt_usrjquota, 0, MOPT_Q}, 143226092bf5STheodore Ts'o {Opt_grpjquota, 0, MOPT_Q}, 143326092bf5STheodore Ts'o {Opt_offusrjquota, 0, MOPT_Q}, 143426092bf5STheodore Ts'o {Opt_offgrpjquota, 0, MOPT_Q}, 143526092bf5STheodore Ts'o {Opt_jqfmt_vfsold, QFMT_VFS_OLD, MOPT_QFMT}, 143626092bf5STheodore Ts'o {Opt_jqfmt_vfsv0, QFMT_VFS_V0, MOPT_QFMT}, 143726092bf5STheodore Ts'o {Opt_jqfmt_vfsv1, QFMT_VFS_V1, MOPT_QFMT}, 1438df981d03STheodore Ts'o {Opt_max_dir_size_kb, 0, MOPT_GTE0}, 143926092bf5STheodore Ts'o {Opt_err, 0, 0} 144026092bf5STheodore Ts'o }; 144126092bf5STheodore Ts'o 144226092bf5STheodore Ts'o static int handle_mount_opt(struct super_block *sb, char *opt, int token, 144326092bf5STheodore Ts'o substring_t *args, unsigned long *journal_devnum, 144426092bf5STheodore Ts'o unsigned int *journal_ioprio, int is_remount) 144526092bf5STheodore Ts'o { 144626092bf5STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 144726092bf5STheodore Ts'o const struct mount_opts *m; 144808cefc7aSEric W. Biederman kuid_t uid; 144908cefc7aSEric W. Biederman kgid_t gid; 145026092bf5STheodore Ts'o int arg = 0; 145126092bf5STheodore Ts'o 145257f73c2cSTheodore Ts'o #ifdef CONFIG_QUOTA 145357f73c2cSTheodore Ts'o if (token == Opt_usrjquota) 145457f73c2cSTheodore Ts'o return set_qf_name(sb, USRQUOTA, &args[0]); 145557f73c2cSTheodore Ts'o else if (token == Opt_grpjquota) 145657f73c2cSTheodore Ts'o return set_qf_name(sb, GRPQUOTA, &args[0]); 145757f73c2cSTheodore Ts'o else if (token == Opt_offusrjquota) 145857f73c2cSTheodore Ts'o return clear_qf_name(sb, USRQUOTA); 145957f73c2cSTheodore Ts'o else if (token == Opt_offgrpjquota) 146057f73c2cSTheodore Ts'o return clear_qf_name(sb, GRPQUOTA); 146157f73c2cSTheodore Ts'o #endif 146226092bf5STheodore Ts'o switch (token) { 1463f7048605STheodore Ts'o case Opt_noacl: 1464f7048605STheodore Ts'o case Opt_nouser_xattr: 1465f7048605STheodore Ts'o ext4_msg(sb, KERN_WARNING, deprecated_msg, opt, "3.5"); 1466f7048605STheodore Ts'o break; 146726092bf5STheodore Ts'o case Opt_sb: 146826092bf5STheodore Ts'o return 1; /* handled by get_sb_block() */ 146926092bf5STheodore Ts'o case Opt_removed: 14705f3633e3SJan Kara ext4_msg(sb, KERN_WARNING, "Ignoring removed %s option", opt); 147126092bf5STheodore Ts'o return 1; 147226092bf5STheodore Ts'o case Opt_abort: 147326092bf5STheodore Ts'o sbi->s_mount_flags |= EXT4_MF_FS_ABORTED; 147426092bf5STheodore Ts'o return 1; 147526092bf5STheodore Ts'o case Opt_i_version: 147626092bf5STheodore Ts'o sb->s_flags |= MS_I_VERSION; 147726092bf5STheodore Ts'o return 1; 147826092bf5STheodore Ts'o } 147926092bf5STheodore Ts'o 14805f3633e3SJan Kara for (m = ext4_mount_opts; m->token != Opt_err; m++) 14815f3633e3SJan Kara if (token == m->token) 14825f3633e3SJan Kara break; 14835f3633e3SJan Kara 14845f3633e3SJan Kara if (m->token == Opt_err) { 14855f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Unrecognized mount option \"%s\" " 14865f3633e3SJan Kara "or missing value", opt); 14875f3633e3SJan Kara return -1; 14885f3633e3SJan Kara } 14895f3633e3SJan Kara 14908dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT2) && IS_EXT2_SB(sb)) { 14918dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14928dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext2", opt); 14938dc0aa8cSTheodore Ts'o return -1; 14948dc0aa8cSTheodore Ts'o } 14958dc0aa8cSTheodore Ts'o if ((m->flags & MOPT_NO_EXT3) && IS_EXT3_SB(sb)) { 14968dc0aa8cSTheodore Ts'o ext4_msg(sb, KERN_ERR, 14978dc0aa8cSTheodore Ts'o "Mount option \"%s\" incompatible with ext3", opt); 14988dc0aa8cSTheodore Ts'o return -1; 14998dc0aa8cSTheodore Ts'o } 15008dc0aa8cSTheodore Ts'o 1501ad4eec61SEric Sandeen if (args->from && !(m->flags & MOPT_STRING) && match_int(args, &arg)) 15020efb3b23SJan Kara return -1; 150326092bf5STheodore Ts'o if (args->from && (m->flags & MOPT_GTE0) && (arg < 0)) 150426092bf5STheodore Ts'o return -1; 150526092bf5STheodore Ts'o if (m->flags & MOPT_EXPLICIT) 150626092bf5STheodore Ts'o set_opt2(sb, EXPLICIT_DELALLOC); 150726092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR_ERR) 150826092bf5STheodore Ts'o clear_opt(sb, ERRORS_MASK); 150926092bf5STheodore Ts'o if (token == Opt_noquota && sb_any_quota_loaded(sb)) { 151026092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "Cannot change quota " 151126092bf5STheodore Ts'o "options when quota turned on"); 151226092bf5STheodore Ts'o return -1; 151326092bf5STheodore Ts'o } 151426092bf5STheodore Ts'o 151526092bf5STheodore Ts'o if (m->flags & MOPT_NOSUPPORT) { 151626092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, "%s option not supported", opt); 151726092bf5STheodore Ts'o } else if (token == Opt_commit) { 151826092bf5STheodore Ts'o if (arg == 0) 151926092bf5STheodore Ts'o arg = JBD2_DEFAULT_MAX_COMMIT_AGE; 152026092bf5STheodore Ts'o sbi->s_commit_interval = HZ * arg; 152126092bf5STheodore Ts'o } else if (token == Opt_max_batch_time) { 152226092bf5STheodore Ts'o if (arg == 0) 152326092bf5STheodore Ts'o arg = EXT4_DEF_MAX_BATCH_TIME; 152426092bf5STheodore Ts'o sbi->s_max_batch_time = arg; 152526092bf5STheodore Ts'o } else if (token == Opt_min_batch_time) { 152626092bf5STheodore Ts'o sbi->s_min_batch_time = arg; 152726092bf5STheodore Ts'o } else if (token == Opt_inode_readahead_blks) { 1528e33e60eaSJan Kara if (arg && (arg > (1 << 30) || !is_power_of_2(arg))) { 1529e33e60eaSJan Kara ext4_msg(sb, KERN_ERR, 1530e33e60eaSJan Kara "EXT4-fs: inode_readahead_blks must be " 1531e33e60eaSJan Kara "0 or a power of 2 smaller than 2^31"); 153226092bf5STheodore Ts'o return -1; 153326092bf5STheodore Ts'o } 153426092bf5STheodore Ts'o sbi->s_inode_readahead_blks = arg; 153526092bf5STheodore Ts'o } else if (token == Opt_init_itable) { 153626092bf5STheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 153726092bf5STheodore Ts'o if (!args->from) 153826092bf5STheodore Ts'o arg = EXT4_DEF_LI_WAIT_MULT; 153926092bf5STheodore Ts'o sbi->s_li_wait_mult = arg; 1540df981d03STheodore Ts'o } else if (token == Opt_max_dir_size_kb) { 1541df981d03STheodore Ts'o sbi->s_max_dir_size_kb = arg; 154226092bf5STheodore Ts'o } else if (token == Opt_stripe) { 154326092bf5STheodore Ts'o sbi->s_stripe = arg; 15440efb3b23SJan Kara } else if (token == Opt_resuid) { 15450efb3b23SJan Kara uid = make_kuid(current_user_ns(), arg); 15460efb3b23SJan Kara if (!uid_valid(uid)) { 15475f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid uid value %d", arg); 15480efb3b23SJan Kara return -1; 15490efb3b23SJan Kara } 15500efb3b23SJan Kara sbi->s_resuid = uid; 15510efb3b23SJan Kara } else if (token == Opt_resgid) { 15520efb3b23SJan Kara gid = make_kgid(current_user_ns(), arg); 15530efb3b23SJan Kara if (!gid_valid(gid)) { 15545f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid gid value %d", arg); 15550efb3b23SJan Kara return -1; 15560efb3b23SJan Kara } 15570efb3b23SJan Kara sbi->s_resgid = gid; 15580efb3b23SJan Kara } else if (token == Opt_journal_dev) { 15590efb3b23SJan Kara if (is_remount) { 15600efb3b23SJan Kara ext4_msg(sb, KERN_ERR, 15610efb3b23SJan Kara "Cannot specify journal on remount"); 15620efb3b23SJan Kara return -1; 15630efb3b23SJan Kara } 15640efb3b23SJan Kara *journal_devnum = arg; 1565ad4eec61SEric Sandeen } else if (token == Opt_journal_path) { 1566ad4eec61SEric Sandeen char *journal_path; 1567ad4eec61SEric Sandeen struct inode *journal_inode; 1568ad4eec61SEric Sandeen struct path path; 1569ad4eec61SEric Sandeen int error; 1570ad4eec61SEric Sandeen 1571ad4eec61SEric Sandeen if (is_remount) { 1572ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, 1573ad4eec61SEric Sandeen "Cannot specify journal on remount"); 1574ad4eec61SEric Sandeen return -1; 1575ad4eec61SEric Sandeen } 1576ad4eec61SEric Sandeen journal_path = match_strdup(&args[0]); 1577ad4eec61SEric Sandeen if (!journal_path) { 1578ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not dup " 1579ad4eec61SEric Sandeen "journal device string"); 1580ad4eec61SEric Sandeen return -1; 1581ad4eec61SEric Sandeen } 1582ad4eec61SEric Sandeen 1583ad4eec61SEric Sandeen error = kern_path(journal_path, LOOKUP_FOLLOW, &path); 1584ad4eec61SEric Sandeen if (error) { 1585ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: could not find " 1586ad4eec61SEric Sandeen "journal device path: error %d", error); 1587ad4eec61SEric Sandeen kfree(journal_path); 1588ad4eec61SEric Sandeen return -1; 1589ad4eec61SEric Sandeen } 1590ad4eec61SEric Sandeen 1591ad4eec61SEric Sandeen journal_inode = path.dentry->d_inode; 1592ad4eec61SEric Sandeen if (!S_ISBLK(journal_inode->i_mode)) { 1593ad4eec61SEric Sandeen ext4_msg(sb, KERN_ERR, "error: journal path %s " 1594ad4eec61SEric Sandeen "is not a block device", journal_path); 1595ad4eec61SEric Sandeen path_put(&path); 1596ad4eec61SEric Sandeen kfree(journal_path); 1597ad4eec61SEric Sandeen return -1; 1598ad4eec61SEric Sandeen } 1599ad4eec61SEric Sandeen 1600ad4eec61SEric Sandeen *journal_devnum = new_encode_dev(journal_inode->i_rdev); 1601ad4eec61SEric Sandeen path_put(&path); 1602ad4eec61SEric Sandeen kfree(journal_path); 16030efb3b23SJan Kara } else if (token == Opt_journal_ioprio) { 16040efb3b23SJan Kara if (arg > 7) { 16055f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Invalid journal IO priority" 16060efb3b23SJan Kara " (must be 0-7)"); 16070efb3b23SJan Kara return -1; 16080efb3b23SJan Kara } 16090efb3b23SJan Kara *journal_ioprio = 16100efb3b23SJan Kara IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg); 161126092bf5STheodore Ts'o } else if (m->flags & MOPT_DATAJ) { 161226092bf5STheodore Ts'o if (is_remount) { 161326092bf5STheodore Ts'o if (!sbi->s_journal) 161426092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, "Remounting file system with no journal so ignoring journalled data option"); 16155f3633e3SJan Kara else if (test_opt(sb, DATA_FLAGS) != m->mount_opt) { 161626092bf5STheodore Ts'o ext4_msg(sb, KERN_ERR, 161726092bf5STheodore Ts'o "Cannot change data mode on remount"); 161826092bf5STheodore Ts'o return -1; 161926092bf5STheodore Ts'o } 162026092bf5STheodore Ts'o } else { 162126092bf5STheodore Ts'o clear_opt(sb, DATA_FLAGS); 162226092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 162326092bf5STheodore Ts'o } 162426092bf5STheodore Ts'o #ifdef CONFIG_QUOTA 162526092bf5STheodore Ts'o } else if (m->flags & MOPT_QFMT) { 162626092bf5STheodore Ts'o if (sb_any_quota_loaded(sb) && 162726092bf5STheodore Ts'o sbi->s_jquota_fmt != m->mount_opt) { 16285f3633e3SJan Kara ext4_msg(sb, KERN_ERR, "Cannot change journaled " 16295f3633e3SJan Kara "quota options when quota turned on"); 163026092bf5STheodore Ts'o return -1; 163126092bf5STheodore Ts'o } 1632262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 1633262b4662SJan Kara EXT4_FEATURE_RO_COMPAT_QUOTA)) { 1634262b4662SJan Kara ext4_msg(sb, KERN_ERR, 1635262b4662SJan Kara "Cannot set journaled quota options " 1636262b4662SJan Kara "when QUOTA feature is enabled"); 1637262b4662SJan Kara return -1; 1638262b4662SJan Kara } 163926092bf5STheodore Ts'o sbi->s_jquota_fmt = m->mount_opt; 164026092bf5STheodore Ts'o #endif 164126092bf5STheodore Ts'o } else { 164226092bf5STheodore Ts'o if (!args->from) 164326092bf5STheodore Ts'o arg = 1; 164426092bf5STheodore Ts'o if (m->flags & MOPT_CLEAR) 164526092bf5STheodore Ts'o arg = !arg; 164626092bf5STheodore Ts'o else if (unlikely(!(m->flags & MOPT_SET))) { 164726092bf5STheodore Ts'o ext4_msg(sb, KERN_WARNING, 164826092bf5STheodore Ts'o "buggy handling of option %s", opt); 164926092bf5STheodore Ts'o WARN_ON(1); 165026092bf5STheodore Ts'o return -1; 165126092bf5STheodore Ts'o } 165226092bf5STheodore Ts'o if (arg != 0) 165326092bf5STheodore Ts'o sbi->s_mount_opt |= m->mount_opt; 165426092bf5STheodore Ts'o else 165526092bf5STheodore Ts'o sbi->s_mount_opt &= ~m->mount_opt; 165626092bf5STheodore Ts'o } 165726092bf5STheodore Ts'o return 1; 165826092bf5STheodore Ts'o } 165926092bf5STheodore Ts'o 1660ac27a0ecSDave Kleikamp static int parse_options(char *options, struct super_block *sb, 1661c3191067STheodore Ts'o unsigned long *journal_devnum, 1662b3881f74STheodore Ts'o unsigned int *journal_ioprio, 1663661aa520SEric Sandeen int is_remount) 1664ac27a0ecSDave Kleikamp { 1665617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1666ac27a0ecSDave Kleikamp char *p; 1667ac27a0ecSDave Kleikamp substring_t args[MAX_OPT_ARGS]; 166826092bf5STheodore Ts'o int token; 1669ac27a0ecSDave Kleikamp 1670ac27a0ecSDave Kleikamp if (!options) 1671ac27a0ecSDave Kleikamp return 1; 1672ac27a0ecSDave Kleikamp 1673ac27a0ecSDave Kleikamp while ((p = strsep(&options, ",")) != NULL) { 1674ac27a0ecSDave Kleikamp if (!*p) 1675ac27a0ecSDave Kleikamp continue; 167615121c18SEric Sandeen /* 167715121c18SEric Sandeen * Initialize args struct so we know whether arg was 167815121c18SEric Sandeen * found; some options take optional arguments. 167915121c18SEric Sandeen */ 1680caecd0afSSachin Kamat args[0].to = args[0].from = NULL; 1681ac27a0ecSDave Kleikamp token = match_token(p, tokens, args); 168226092bf5STheodore Ts'o if (handle_mount_opt(sb, p, token, args, journal_devnum, 168326092bf5STheodore Ts'o journal_ioprio, is_remount) < 0) 1684ac27a0ecSDave Kleikamp return 0; 1685ac27a0ecSDave Kleikamp } 1686ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 1687262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 1688262b4662SJan Kara (test_opt(sb, USRQUOTA) || test_opt(sb, GRPQUOTA))) { 1689262b4662SJan Kara ext4_msg(sb, KERN_ERR, "Cannot set quota options when QUOTA " 1690262b4662SJan Kara "feature is enabled"); 1691262b4662SJan Kara return 0; 1692262b4662SJan Kara } 1693ac27a0ecSDave Kleikamp if (sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 1694482a7425SDmitry Monakhov if (test_opt(sb, USRQUOTA) && sbi->s_qf_names[USRQUOTA]) 1695fd8c37ecSTheodore Ts'o clear_opt(sb, USRQUOTA); 1696ac27a0ecSDave Kleikamp 1697482a7425SDmitry Monakhov if (test_opt(sb, GRPQUOTA) && sbi->s_qf_names[GRPQUOTA]) 1698fd8c37ecSTheodore Ts'o clear_opt(sb, GRPQUOTA); 1699ac27a0ecSDave Kleikamp 170056c50f11SDmitry Monakhov if (test_opt(sb, GRPQUOTA) || test_opt(sb, USRQUOTA)) { 1701b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "old and new quota " 1702b31e1552SEric Sandeen "format mixing"); 1703ac27a0ecSDave Kleikamp return 0; 1704ac27a0ecSDave Kleikamp } 1705ac27a0ecSDave Kleikamp 1706ac27a0ecSDave Kleikamp if (!sbi->s_jquota_fmt) { 1707b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 1708b31e1552SEric Sandeen "not specified"); 1709ac27a0ecSDave Kleikamp return 0; 1710ac27a0ecSDave Kleikamp } 1711ac27a0ecSDave Kleikamp } else { 1712ac27a0ecSDave Kleikamp if (sbi->s_jquota_fmt) { 1713b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journaled quota format " 17142c8be6b2SJan Kara "specified with no journaling " 1715b31e1552SEric Sandeen "enabled"); 1716ac27a0ecSDave Kleikamp return 0; 1717ac27a0ecSDave Kleikamp } 1718ac27a0ecSDave Kleikamp } 1719ac27a0ecSDave Kleikamp #endif 1720261cb20cSJan Kara if (test_opt(sb, DIOREAD_NOLOCK)) { 1721261cb20cSJan Kara int blocksize = 1722261cb20cSJan Kara BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size); 1723261cb20cSJan Kara 1724261cb20cSJan Kara if (blocksize < PAGE_CACHE_SIZE) { 1725261cb20cSJan Kara ext4_msg(sb, KERN_ERR, "can't mount with " 1726261cb20cSJan Kara "dioread_nolock if block size != PAGE_SIZE"); 1727261cb20cSJan Kara return 0; 1728261cb20cSJan Kara } 1729261cb20cSJan Kara } 1730ac27a0ecSDave Kleikamp return 1; 1731ac27a0ecSDave Kleikamp } 1732ac27a0ecSDave Kleikamp 17332adf6da8STheodore Ts'o static inline void ext4_show_quota_options(struct seq_file *seq, 17342adf6da8STheodore Ts'o struct super_block *sb) 17352adf6da8STheodore Ts'o { 17362adf6da8STheodore Ts'o #if defined(CONFIG_QUOTA) 17372adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17382adf6da8STheodore Ts'o 17392adf6da8STheodore Ts'o if (sbi->s_jquota_fmt) { 17402adf6da8STheodore Ts'o char *fmtname = ""; 17412adf6da8STheodore Ts'o 17422adf6da8STheodore Ts'o switch (sbi->s_jquota_fmt) { 17432adf6da8STheodore Ts'o case QFMT_VFS_OLD: 17442adf6da8STheodore Ts'o fmtname = "vfsold"; 17452adf6da8STheodore Ts'o break; 17462adf6da8STheodore Ts'o case QFMT_VFS_V0: 17472adf6da8STheodore Ts'o fmtname = "vfsv0"; 17482adf6da8STheodore Ts'o break; 17492adf6da8STheodore Ts'o case QFMT_VFS_V1: 17502adf6da8STheodore Ts'o fmtname = "vfsv1"; 17512adf6da8STheodore Ts'o break; 17522adf6da8STheodore Ts'o } 17532adf6da8STheodore Ts'o seq_printf(seq, ",jqfmt=%s", fmtname); 17542adf6da8STheodore Ts'o } 17552adf6da8STheodore Ts'o 17562adf6da8STheodore Ts'o if (sbi->s_qf_names[USRQUOTA]) 17572adf6da8STheodore Ts'o seq_printf(seq, ",usrjquota=%s", sbi->s_qf_names[USRQUOTA]); 17582adf6da8STheodore Ts'o 17592adf6da8STheodore Ts'o if (sbi->s_qf_names[GRPQUOTA]) 17602adf6da8STheodore Ts'o seq_printf(seq, ",grpjquota=%s", sbi->s_qf_names[GRPQUOTA]); 17612adf6da8STheodore Ts'o #endif 17622adf6da8STheodore Ts'o } 17632adf6da8STheodore Ts'o 17645a916be1STheodore Ts'o static const char *token2str(int token) 17655a916be1STheodore Ts'o { 176650df9fd5SHerton Ronaldo Krzesinski const struct match_token *t; 17675a916be1STheodore Ts'o 17685a916be1STheodore Ts'o for (t = tokens; t->token != Opt_err; t++) 17695a916be1STheodore Ts'o if (t->token == token && !strchr(t->pattern, '=')) 17705a916be1STheodore Ts'o break; 17715a916be1STheodore Ts'o return t->pattern; 17725a916be1STheodore Ts'o } 17735a916be1STheodore Ts'o 17742adf6da8STheodore Ts'o /* 17752adf6da8STheodore Ts'o * Show an option if 17762adf6da8STheodore Ts'o * - it's set to a non-default value OR 17772adf6da8STheodore Ts'o * - if the per-sb default is different from the global default 17782adf6da8STheodore Ts'o */ 177966acdcf4STheodore Ts'o static int _ext4_show_options(struct seq_file *seq, struct super_block *sb, 178066acdcf4STheodore Ts'o int nodefs) 17812adf6da8STheodore Ts'o { 17822adf6da8STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 17832adf6da8STheodore Ts'o struct ext4_super_block *es = sbi->s_es; 178466acdcf4STheodore Ts'o int def_errors, def_mount_opt = nodefs ? 0 : sbi->s_def_mount_opt; 17855a916be1STheodore Ts'o const struct mount_opts *m; 178666acdcf4STheodore Ts'o char sep = nodefs ? '\n' : ','; 17872adf6da8STheodore Ts'o 178866acdcf4STheodore Ts'o #define SEQ_OPTS_PUTS(str) seq_printf(seq, "%c" str, sep) 178966acdcf4STheodore Ts'o #define SEQ_OPTS_PRINT(str, arg) seq_printf(seq, "%c" str, sep, arg) 17902adf6da8STheodore Ts'o 17912adf6da8STheodore Ts'o if (sbi->s_sb_block != 1) 17925a916be1STheodore Ts'o SEQ_OPTS_PRINT("sb=%llu", sbi->s_sb_block); 17935a916be1STheodore Ts'o 17945a916be1STheodore Ts'o for (m = ext4_mount_opts; m->token != Opt_err; m++) { 17955a916be1STheodore Ts'o int want_set = m->flags & MOPT_SET; 17965a916be1STheodore Ts'o if (((m->flags & (MOPT_SET|MOPT_CLEAR)) == 0) || 17975a916be1STheodore Ts'o (m->flags & MOPT_CLEAR_ERR)) 17985a916be1STheodore Ts'o continue; 179966acdcf4STheodore Ts'o if (!(m->mount_opt & (sbi->s_mount_opt ^ def_mount_opt))) 18005a916be1STheodore Ts'o continue; /* skip if same as the default */ 18015a916be1STheodore Ts'o if ((want_set && 18025a916be1STheodore Ts'o (sbi->s_mount_opt & m->mount_opt) != m->mount_opt) || 18035a916be1STheodore Ts'o (!want_set && (sbi->s_mount_opt & m->mount_opt))) 18045a916be1STheodore Ts'o continue; /* select Opt_noFoo vs Opt_Foo */ 18055a916be1STheodore Ts'o SEQ_OPTS_PRINT("%s", token2str(m->token)); 18065a916be1STheodore Ts'o } 18075a916be1STheodore Ts'o 180808cefc7aSEric W. Biederman if (nodefs || !uid_eq(sbi->s_resuid, make_kuid(&init_user_ns, EXT4_DEF_RESUID)) || 18095a916be1STheodore Ts'o le16_to_cpu(es->s_def_resuid) != EXT4_DEF_RESUID) 181008cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resuid=%u", 181108cefc7aSEric W. Biederman from_kuid_munged(&init_user_ns, sbi->s_resuid)); 181208cefc7aSEric W. Biederman if (nodefs || !gid_eq(sbi->s_resgid, make_kgid(&init_user_ns, EXT4_DEF_RESGID)) || 18135a916be1STheodore Ts'o le16_to_cpu(es->s_def_resgid) != EXT4_DEF_RESGID) 181408cefc7aSEric W. Biederman SEQ_OPTS_PRINT("resgid=%u", 181508cefc7aSEric W. Biederman from_kgid_munged(&init_user_ns, sbi->s_resgid)); 181666acdcf4STheodore Ts'o def_errors = nodefs ? -1 : le16_to_cpu(es->s_errors); 18175a916be1STheodore Ts'o if (test_opt(sb, ERRORS_RO) && def_errors != EXT4_ERRORS_RO) 18185a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=remount-ro"); 18192adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_CONT) && def_errors != EXT4_ERRORS_CONTINUE) 18205a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=continue"); 18212adf6da8STheodore Ts'o if (test_opt(sb, ERRORS_PANIC) && def_errors != EXT4_ERRORS_PANIC) 18225a916be1STheodore Ts'o SEQ_OPTS_PUTS("errors=panic"); 182366acdcf4STheodore Ts'o if (nodefs || sbi->s_commit_interval != JBD2_DEFAULT_MAX_COMMIT_AGE*HZ) 18245a916be1STheodore Ts'o SEQ_OPTS_PRINT("commit=%lu", sbi->s_commit_interval / HZ); 182566acdcf4STheodore Ts'o if (nodefs || sbi->s_min_batch_time != EXT4_DEF_MIN_BATCH_TIME) 18265a916be1STheodore Ts'o SEQ_OPTS_PRINT("min_batch_time=%u", sbi->s_min_batch_time); 182766acdcf4STheodore Ts'o if (nodefs || sbi->s_max_batch_time != EXT4_DEF_MAX_BATCH_TIME) 18285a916be1STheodore Ts'o SEQ_OPTS_PRINT("max_batch_time=%u", sbi->s_max_batch_time); 18292adf6da8STheodore Ts'o if (sb->s_flags & MS_I_VERSION) 18305a916be1STheodore Ts'o SEQ_OPTS_PUTS("i_version"); 183166acdcf4STheodore Ts'o if (nodefs || sbi->s_stripe) 18325a916be1STheodore Ts'o SEQ_OPTS_PRINT("stripe=%lu", sbi->s_stripe); 183366acdcf4STheodore Ts'o if (EXT4_MOUNT_DATA_FLAGS & (sbi->s_mount_opt ^ def_mount_opt)) { 18342adf6da8STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 18355a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=journal"); 18362adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 18375a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=ordered"); 18382adf6da8STheodore Ts'o else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA) 18395a916be1STheodore Ts'o SEQ_OPTS_PUTS("data=writeback"); 18405a916be1STheodore Ts'o } 184166acdcf4STheodore Ts'o if (nodefs || 184266acdcf4STheodore Ts'o sbi->s_inode_readahead_blks != EXT4_DEF_INODE_READAHEAD_BLKS) 18435a916be1STheodore Ts'o SEQ_OPTS_PRINT("inode_readahead_blks=%u", 18442adf6da8STheodore Ts'o sbi->s_inode_readahead_blks); 18452adf6da8STheodore Ts'o 184666acdcf4STheodore Ts'o if (nodefs || (test_opt(sb, INIT_INODE_TABLE) && 184766acdcf4STheodore Ts'o (sbi->s_li_wait_mult != EXT4_DEF_LI_WAIT_MULT))) 18485a916be1STheodore Ts'o SEQ_OPTS_PRINT("init_itable=%u", sbi->s_li_wait_mult); 1849df981d03STheodore Ts'o if (nodefs || sbi->s_max_dir_size_kb) 1850df981d03STheodore Ts'o SEQ_OPTS_PRINT("max_dir_size_kb=%u", sbi->s_max_dir_size_kb); 18512adf6da8STheodore Ts'o 18522adf6da8STheodore Ts'o ext4_show_quota_options(seq, sb); 18532adf6da8STheodore Ts'o return 0; 18542adf6da8STheodore Ts'o } 18552adf6da8STheodore Ts'o 185666acdcf4STheodore Ts'o static int ext4_show_options(struct seq_file *seq, struct dentry *root) 185766acdcf4STheodore Ts'o { 185866acdcf4STheodore Ts'o return _ext4_show_options(seq, root->d_sb, 0); 185966acdcf4STheodore Ts'o } 186066acdcf4STheodore Ts'o 186166acdcf4STheodore Ts'o static int options_seq_show(struct seq_file *seq, void *offset) 186266acdcf4STheodore Ts'o { 186366acdcf4STheodore Ts'o struct super_block *sb = seq->private; 186466acdcf4STheodore Ts'o int rc; 186566acdcf4STheodore Ts'o 186666acdcf4STheodore Ts'o seq_puts(seq, (sb->s_flags & MS_RDONLY) ? "ro" : "rw"); 186766acdcf4STheodore Ts'o rc = _ext4_show_options(seq, sb, 1); 186866acdcf4STheodore Ts'o seq_puts(seq, "\n"); 186966acdcf4STheodore Ts'o return rc; 187066acdcf4STheodore Ts'o } 187166acdcf4STheodore Ts'o 187266acdcf4STheodore Ts'o static int options_open_fs(struct inode *inode, struct file *file) 187366acdcf4STheodore Ts'o { 1874d9dda78bSAl Viro return single_open(file, options_seq_show, PDE_DATA(inode)); 187566acdcf4STheodore Ts'o } 187666acdcf4STheodore Ts'o 187766acdcf4STheodore Ts'o static const struct file_operations ext4_seq_options_fops = { 187866acdcf4STheodore Ts'o .owner = THIS_MODULE, 187966acdcf4STheodore Ts'o .open = options_open_fs, 188066acdcf4STheodore Ts'o .read = seq_read, 188166acdcf4STheodore Ts'o .llseek = seq_lseek, 188266acdcf4STheodore Ts'o .release = single_release, 188366acdcf4STheodore Ts'o }; 188466acdcf4STheodore Ts'o 1885617ba13bSMingming Cao static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es, 1886ac27a0ecSDave Kleikamp int read_only) 1887ac27a0ecSDave Kleikamp { 1888617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 1889ac27a0ecSDave Kleikamp int res = 0; 1890ac27a0ecSDave Kleikamp 1891617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) > EXT4_MAX_SUPP_REV) { 1892b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "revision level too high, " 1893b31e1552SEric Sandeen "forcing read-only mode"); 1894ac27a0ecSDave Kleikamp res = MS_RDONLY; 1895ac27a0ecSDave Kleikamp } 1896ac27a0ecSDave Kleikamp if (read_only) 1897281b5995STheodore Ts'o goto done; 1898617ba13bSMingming Cao if (!(sbi->s_mount_state & EXT4_VALID_FS)) 1899b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "warning: mounting unchecked fs, " 1900b31e1552SEric Sandeen "running e2fsck is recommended"); 1901617ba13bSMingming Cao else if ((sbi->s_mount_state & EXT4_ERROR_FS)) 1902b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1903b31e1552SEric Sandeen "warning: mounting fs with errors, " 1904b31e1552SEric Sandeen "running e2fsck is recommended"); 1905ed3ce80aSTao Ma else if ((__s16) le16_to_cpu(es->s_max_mnt_count) > 0 && 1906ac27a0ecSDave Kleikamp le16_to_cpu(es->s_mnt_count) >= 1907ac27a0ecSDave Kleikamp (unsigned short) (__s16) le16_to_cpu(es->s_max_mnt_count)) 1908b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1909b31e1552SEric Sandeen "warning: maximal mount count reached, " 1910b31e1552SEric Sandeen "running e2fsck is recommended"); 1911ac27a0ecSDave Kleikamp else if (le32_to_cpu(es->s_checkinterval) && 1912ac27a0ecSDave Kleikamp (le32_to_cpu(es->s_lastcheck) + 1913ac27a0ecSDave Kleikamp le32_to_cpu(es->s_checkinterval) <= get_seconds())) 1914b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 1915b31e1552SEric Sandeen "warning: checktime reached, " 1916b31e1552SEric Sandeen "running e2fsck is recommended"); 19170390131bSFrank Mayhar if (!sbi->s_journal) 1918216c34b2SMarcin Slusarz es->s_state &= cpu_to_le16(~EXT4_VALID_FS); 1919ac27a0ecSDave Kleikamp if (!(__s16) le16_to_cpu(es->s_max_mnt_count)) 1920617ba13bSMingming Cao es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT); 1921e8546d06SMarcin Slusarz le16_add_cpu(&es->s_mnt_count, 1); 1922ac27a0ecSDave Kleikamp es->s_mtime = cpu_to_le32(get_seconds()); 1923617ba13bSMingming Cao ext4_update_dynamic_rev(sb); 19240390131bSFrank Mayhar if (sbi->s_journal) 1925617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 1926ac27a0ecSDave Kleikamp 1927e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 1928281b5995STheodore Ts'o done: 1929ac27a0ecSDave Kleikamp if (test_opt(sb, DEBUG)) 1930a9df9a49STheodore Ts'o printk(KERN_INFO "[EXT4 FS bs=%lu, gc=%u, " 1931a2595b8aSTheodore Ts'o "bpg=%lu, ipg=%lu, mo=%04x, mo2=%04x]\n", 1932ac27a0ecSDave Kleikamp sb->s_blocksize, 1933ac27a0ecSDave Kleikamp sbi->s_groups_count, 1934617ba13bSMingming Cao EXT4_BLOCKS_PER_GROUP(sb), 1935617ba13bSMingming Cao EXT4_INODES_PER_GROUP(sb), 1936a2595b8aSTheodore Ts'o sbi->s_mount_opt, sbi->s_mount_opt2); 1937ac27a0ecSDave Kleikamp 19387abc52c2SDan Magenheimer cleancache_init_fs(sb); 1939ac27a0ecSDave Kleikamp return res; 1940ac27a0ecSDave Kleikamp } 1941ac27a0ecSDave Kleikamp 1942117fff10STheodore Ts'o int ext4_alloc_flex_bg_array(struct super_block *sb, ext4_group_t ngroup) 1943117fff10STheodore Ts'o { 1944117fff10STheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 1945117fff10STheodore Ts'o struct flex_groups *new_groups; 1946117fff10STheodore Ts'o int size; 1947117fff10STheodore Ts'o 1948117fff10STheodore Ts'o if (!sbi->s_log_groups_per_flex) 1949117fff10STheodore Ts'o return 0; 1950117fff10STheodore Ts'o 1951117fff10STheodore Ts'o size = ext4_flex_group(sbi, ngroup - 1) + 1; 1952117fff10STheodore Ts'o if (size <= sbi->s_flex_groups_allocated) 1953117fff10STheodore Ts'o return 0; 1954117fff10STheodore Ts'o 1955117fff10STheodore Ts'o size = roundup_pow_of_two(size * sizeof(struct flex_groups)); 1956117fff10STheodore Ts'o new_groups = ext4_kvzalloc(size, GFP_KERNEL); 1957117fff10STheodore Ts'o if (!new_groups) { 1958117fff10STheodore Ts'o ext4_msg(sb, KERN_ERR, "not enough memory for %d flex groups", 1959117fff10STheodore Ts'o size / (int) sizeof(struct flex_groups)); 1960117fff10STheodore Ts'o return -ENOMEM; 1961117fff10STheodore Ts'o } 1962117fff10STheodore Ts'o 1963117fff10STheodore Ts'o if (sbi->s_flex_groups) { 1964117fff10STheodore Ts'o memcpy(new_groups, sbi->s_flex_groups, 1965117fff10STheodore Ts'o (sbi->s_flex_groups_allocated * 1966117fff10STheodore Ts'o sizeof(struct flex_groups))); 1967117fff10STheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 1968117fff10STheodore Ts'o } 1969117fff10STheodore Ts'o sbi->s_flex_groups = new_groups; 1970117fff10STheodore Ts'o sbi->s_flex_groups_allocated = size / sizeof(struct flex_groups); 1971117fff10STheodore Ts'o return 0; 1972117fff10STheodore Ts'o } 1973117fff10STheodore Ts'o 1974772cb7c8SJose R. Santos static int ext4_fill_flex_info(struct super_block *sb) 1975772cb7c8SJose R. Santos { 1976772cb7c8SJose R. Santos struct ext4_sb_info *sbi = EXT4_SB(sb); 1977772cb7c8SJose R. Santos struct ext4_group_desc *gdp = NULL; 1978772cb7c8SJose R. Santos ext4_group_t flex_group; 1979117fff10STheodore Ts'o int i, err; 1980772cb7c8SJose R. Santos 1981503358aeSTheodore Ts'o sbi->s_log_groups_per_flex = sbi->s_es->s_log_groups_per_flex; 1982d50f2ab6SXi Wang if (sbi->s_log_groups_per_flex < 1 || sbi->s_log_groups_per_flex > 31) { 1983772cb7c8SJose R. Santos sbi->s_log_groups_per_flex = 0; 1984772cb7c8SJose R. Santos return 1; 1985772cb7c8SJose R. Santos } 1986772cb7c8SJose R. Santos 1987117fff10STheodore Ts'o err = ext4_alloc_flex_bg_array(sb, sbi->s_groups_count); 1988117fff10STheodore Ts'o if (err) 1989772cb7c8SJose R. Santos goto failed; 1990772cb7c8SJose R. Santos 1991772cb7c8SJose R. Santos for (i = 0; i < sbi->s_groups_count; i++) { 199288b6edd1STheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 1993772cb7c8SJose R. Santos 1994772cb7c8SJose R. Santos flex_group = ext4_flex_group(sbi, i); 19957ad9bb65STheodore Ts'o atomic_add(ext4_free_inodes_count(sb, gdp), 19967ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].free_inodes); 199790ba983fSTheodore Ts'o atomic64_add(ext4_free_group_clusters(sb, gdp), 199824aaa8efSTheodore Ts'o &sbi->s_flex_groups[flex_group].free_clusters); 19997ad9bb65STheodore Ts'o atomic_add(ext4_used_dirs_count(sb, gdp), 20007ad9bb65STheodore Ts'o &sbi->s_flex_groups[flex_group].used_dirs); 2001772cb7c8SJose R. Santos } 2002772cb7c8SJose R. Santos 2003772cb7c8SJose R. Santos return 1; 2004772cb7c8SJose R. Santos failed: 2005772cb7c8SJose R. Santos return 0; 2006772cb7c8SJose R. Santos } 2007772cb7c8SJose R. Santos 2008feb0ab32SDarrick J. Wong static __le16 ext4_group_desc_csum(struct ext4_sb_info *sbi, __u32 block_group, 2009717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2010717d50e4SAndreas Dilger { 2011feb0ab32SDarrick J. Wong int offset; 2012717d50e4SAndreas Dilger __u16 crc = 0; 2013717d50e4SAndreas Dilger __le32 le_group = cpu_to_le32(block_group); 2014717d50e4SAndreas Dilger 2015feb0ab32SDarrick J. Wong if ((sbi->s_es->s_feature_ro_compat & 2016feb0ab32SDarrick J. Wong cpu_to_le32(EXT4_FEATURE_RO_COMPAT_METADATA_CSUM))) { 2017feb0ab32SDarrick J. Wong /* Use new metadata_csum algorithm */ 2018d6a77105STheodore Ts'o __le16 save_csum; 2019feb0ab32SDarrick J. Wong __u32 csum32; 2020feb0ab32SDarrick J. Wong 2021d6a77105STheodore Ts'o save_csum = gdp->bg_checksum; 2022feb0ab32SDarrick J. Wong gdp->bg_checksum = 0; 2023feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, sbi->s_csum_seed, (__u8 *)&le_group, 2024feb0ab32SDarrick J. Wong sizeof(le_group)); 2025feb0ab32SDarrick J. Wong csum32 = ext4_chksum(sbi, csum32, (__u8 *)gdp, 2026feb0ab32SDarrick J. Wong sbi->s_desc_size); 2027d6a77105STheodore Ts'o gdp->bg_checksum = save_csum; 2028feb0ab32SDarrick J. Wong 2029feb0ab32SDarrick J. Wong crc = csum32 & 0xFFFF; 2030feb0ab32SDarrick J. Wong goto out; 2031feb0ab32SDarrick J. Wong } 2032feb0ab32SDarrick J. Wong 2033feb0ab32SDarrick J. Wong /* old crc16 code */ 2034feb0ab32SDarrick J. Wong offset = offsetof(struct ext4_group_desc, bg_checksum); 2035feb0ab32SDarrick J. Wong 2036717d50e4SAndreas Dilger crc = crc16(~0, sbi->s_es->s_uuid, sizeof(sbi->s_es->s_uuid)); 2037717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)&le_group, sizeof(le_group)); 2038717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp, offset); 2039717d50e4SAndreas Dilger offset += sizeof(gdp->bg_checksum); /* skip checksum */ 2040717d50e4SAndreas Dilger /* for checksum of struct ext4_group_desc do the rest...*/ 2041717d50e4SAndreas Dilger if ((sbi->s_es->s_feature_incompat & 2042717d50e4SAndreas Dilger cpu_to_le32(EXT4_FEATURE_INCOMPAT_64BIT)) && 2043717d50e4SAndreas Dilger offset < le16_to_cpu(sbi->s_es->s_desc_size)) 2044717d50e4SAndreas Dilger crc = crc16(crc, (__u8 *)gdp + offset, 2045717d50e4SAndreas Dilger le16_to_cpu(sbi->s_es->s_desc_size) - 2046717d50e4SAndreas Dilger offset); 2047717d50e4SAndreas Dilger 2048feb0ab32SDarrick J. Wong out: 2049717d50e4SAndreas Dilger return cpu_to_le16(crc); 2050717d50e4SAndreas Dilger } 2051717d50e4SAndreas Dilger 2052feb0ab32SDarrick J. Wong int ext4_group_desc_csum_verify(struct super_block *sb, __u32 block_group, 2053717d50e4SAndreas Dilger struct ext4_group_desc *gdp) 2054717d50e4SAndreas Dilger { 2055feb0ab32SDarrick J. Wong if (ext4_has_group_desc_csum(sb) && 2056feb0ab32SDarrick J. Wong (gdp->bg_checksum != ext4_group_desc_csum(EXT4_SB(sb), 2057feb0ab32SDarrick J. Wong block_group, gdp))) 2058717d50e4SAndreas Dilger return 0; 2059717d50e4SAndreas Dilger 2060717d50e4SAndreas Dilger return 1; 2061717d50e4SAndreas Dilger } 2062717d50e4SAndreas Dilger 2063feb0ab32SDarrick J. Wong void ext4_group_desc_csum_set(struct super_block *sb, __u32 block_group, 2064feb0ab32SDarrick J. Wong struct ext4_group_desc *gdp) 2065feb0ab32SDarrick J. Wong { 2066feb0ab32SDarrick J. Wong if (!ext4_has_group_desc_csum(sb)) 2067feb0ab32SDarrick J. Wong return; 2068feb0ab32SDarrick J. Wong gdp->bg_checksum = ext4_group_desc_csum(EXT4_SB(sb), block_group, gdp); 2069feb0ab32SDarrick J. Wong } 2070feb0ab32SDarrick J. Wong 2071ac27a0ecSDave Kleikamp /* Called at mount-time, super-block is locked */ 2072bfff6873SLukas Czerner static int ext4_check_descriptors(struct super_block *sb, 2073bfff6873SLukas Czerner ext4_group_t *first_not_zeroed) 2074ac27a0ecSDave Kleikamp { 2075617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2076617ba13bSMingming Cao ext4_fsblk_t first_block = le32_to_cpu(sbi->s_es->s_first_data_block); 2077617ba13bSMingming Cao ext4_fsblk_t last_block; 2078bd81d8eeSLaurent Vivier ext4_fsblk_t block_bitmap; 2079bd81d8eeSLaurent Vivier ext4_fsblk_t inode_bitmap; 2080bd81d8eeSLaurent Vivier ext4_fsblk_t inode_table; 2081ce421581SJose R. Santos int flexbg_flag = 0; 2082bfff6873SLukas Czerner ext4_group_t i, grp = sbi->s_groups_count; 2083ac27a0ecSDave Kleikamp 2084ce421581SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 2085ce421581SJose R. Santos flexbg_flag = 1; 2086ce421581SJose R. Santos 2087617ba13bSMingming Cao ext4_debug("Checking group descriptors"); 2088ac27a0ecSDave Kleikamp 2089197cd65aSAkinobu Mita for (i = 0; i < sbi->s_groups_count; i++) { 2090197cd65aSAkinobu Mita struct ext4_group_desc *gdp = ext4_get_group_desc(sb, i, NULL); 2091197cd65aSAkinobu Mita 2092ce421581SJose R. Santos if (i == sbi->s_groups_count - 1 || flexbg_flag) 2093bd81d8eeSLaurent Vivier last_block = ext4_blocks_count(sbi->s_es) - 1; 2094ac27a0ecSDave Kleikamp else 2095ac27a0ecSDave Kleikamp last_block = first_block + 2096617ba13bSMingming Cao (EXT4_BLOCKS_PER_GROUP(sb) - 1); 2097ac27a0ecSDave Kleikamp 2098bfff6873SLukas Czerner if ((grp == sbi->s_groups_count) && 2099bfff6873SLukas Czerner !(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2100bfff6873SLukas Czerner grp = i; 2101bfff6873SLukas Czerner 21028fadc143SAlexandre Ratchov block_bitmap = ext4_block_bitmap(sb, gdp); 21032b2d6d01STheodore Ts'o if (block_bitmap < first_block || block_bitmap > last_block) { 2104b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2105a9df9a49STheodore Ts'o "Block bitmap for group %u not in group " 2106b31e1552SEric Sandeen "(block %llu)!", i, block_bitmap); 2107ac27a0ecSDave Kleikamp return 0; 2108ac27a0ecSDave Kleikamp } 21098fadc143SAlexandre Ratchov inode_bitmap = ext4_inode_bitmap(sb, gdp); 21102b2d6d01STheodore Ts'o if (inode_bitmap < first_block || inode_bitmap > last_block) { 2111b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2112a9df9a49STheodore Ts'o "Inode bitmap for group %u not in group " 2113b31e1552SEric Sandeen "(block %llu)!", i, inode_bitmap); 2114ac27a0ecSDave Kleikamp return 0; 2115ac27a0ecSDave Kleikamp } 21168fadc143SAlexandre Ratchov inode_table = ext4_inode_table(sb, gdp); 2117bd81d8eeSLaurent Vivier if (inode_table < first_block || 21182b2d6d01STheodore Ts'o inode_table + sbi->s_itb_per_group - 1 > last_block) { 2119b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2120a9df9a49STheodore Ts'o "Inode table for group %u not in group " 2121b31e1552SEric Sandeen "(block %llu)!", i, inode_table); 2122ac27a0ecSDave Kleikamp return 0; 2123ac27a0ecSDave Kleikamp } 2124955ce5f5SAneesh Kumar K.V ext4_lock_group(sb, i); 2125feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, i, gdp)) { 2126b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "ext4_check_descriptors: " 2127b31e1552SEric Sandeen "Checksum for group %u failed (%u!=%u)", 2128fd2d4291SAvantika Mathur i, le16_to_cpu(ext4_group_desc_csum(sbi, i, 2129fd2d4291SAvantika Mathur gdp)), le16_to_cpu(gdp->bg_checksum)); 21307ee1ec4cSLi Zefan if (!(sb->s_flags & MS_RDONLY)) { 2131955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2132717d50e4SAndreas Dilger return 0; 2133717d50e4SAndreas Dilger } 21347ee1ec4cSLi Zefan } 2135955ce5f5SAneesh Kumar K.V ext4_unlock_group(sb, i); 2136ce421581SJose R. Santos if (!flexbg_flag) 2137617ba13bSMingming Cao first_block += EXT4_BLOCKS_PER_GROUP(sb); 2138ac27a0ecSDave Kleikamp } 2139bfff6873SLukas Czerner if (NULL != first_not_zeroed) 2140bfff6873SLukas Czerner *first_not_zeroed = grp; 2141ac27a0ecSDave Kleikamp 21425dee5437STheodore Ts'o ext4_free_blocks_count_set(sbi->s_es, 21435dee5437STheodore Ts'o EXT4_C2B(sbi, ext4_count_free_clusters(sb))); 2144617ba13bSMingming Cao sbi->s_es->s_free_inodes_count =cpu_to_le32(ext4_count_free_inodes(sb)); 2145ac27a0ecSDave Kleikamp return 1; 2146ac27a0ecSDave Kleikamp } 2147ac27a0ecSDave Kleikamp 2148617ba13bSMingming Cao /* ext4_orphan_cleanup() walks a singly-linked list of inodes (starting at 2149ac27a0ecSDave Kleikamp * the superblock) which were deleted from all directories, but held open by 2150ac27a0ecSDave Kleikamp * a process at the time of a crash. We walk the list and try to delete these 2151ac27a0ecSDave Kleikamp * inodes at recovery time (only with a read-write filesystem). 2152ac27a0ecSDave Kleikamp * 2153ac27a0ecSDave Kleikamp * In order to keep the orphan inode chain consistent during traversal (in 2154ac27a0ecSDave Kleikamp * case of crash during recovery), we link each inode into the superblock 2155ac27a0ecSDave Kleikamp * orphan list_head and handle it the same way as an inode deletion during 2156ac27a0ecSDave Kleikamp * normal operation (which journals the operations for us). 2157ac27a0ecSDave Kleikamp * 2158ac27a0ecSDave Kleikamp * We only do an iget() and an iput() on each inode, which is very safe if we 2159ac27a0ecSDave Kleikamp * accidentally point at an in-use or already deleted inode. The worst that 2160ac27a0ecSDave Kleikamp * can happen in this case is that we get a "bit already cleared" message from 2161617ba13bSMingming Cao * ext4_free_inode(). The only reason we would point at a wrong inode is if 2162ac27a0ecSDave Kleikamp * e2fsck was run on this filesystem, and it must have already done the orphan 2163ac27a0ecSDave Kleikamp * inode cleanup for us, so we can safely abort without any further action. 2164ac27a0ecSDave Kleikamp */ 2165617ba13bSMingming Cao static void ext4_orphan_cleanup(struct super_block *sb, 2166617ba13bSMingming Cao struct ext4_super_block *es) 2167ac27a0ecSDave Kleikamp { 2168ac27a0ecSDave Kleikamp unsigned int s_flags = sb->s_flags; 2169ac27a0ecSDave Kleikamp int nr_orphans = 0, nr_truncates = 0; 2170ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2171ac27a0ecSDave Kleikamp int i; 2172ac27a0ecSDave Kleikamp #endif 2173ac27a0ecSDave Kleikamp if (!es->s_last_orphan) { 2174ac27a0ecSDave Kleikamp jbd_debug(4, "no orphan inodes to clean up\n"); 2175ac27a0ecSDave Kleikamp return; 2176ac27a0ecSDave Kleikamp } 2177ac27a0ecSDave Kleikamp 2178a8f48a95SEric Sandeen if (bdev_read_only(sb->s_bdev)) { 2179b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 2180b31e1552SEric Sandeen "unavailable, skipping orphan cleanup"); 2181a8f48a95SEric Sandeen return; 2182a8f48a95SEric Sandeen } 2183a8f48a95SEric Sandeen 2184d39195c3SAmir Goldstein /* Check if feature set would not allow a r/w mount */ 2185d39195c3SAmir Goldstein if (!ext4_feature_set_ok(sb, 0)) { 2186d39195c3SAmir Goldstein ext4_msg(sb, KERN_INFO, "Skipping orphan cleanup due to " 2187d39195c3SAmir Goldstein "unknown ROCOMPAT features"); 2188d39195c3SAmir Goldstein return; 2189d39195c3SAmir Goldstein } 2190d39195c3SAmir Goldstein 2191617ba13bSMingming Cao if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) { 2192c25f9bc6SEric Sandeen /* don't clear list on RO mount w/ errors */ 2193c25f9bc6SEric Sandeen if (es->s_last_orphan && !(s_flags & MS_RDONLY)) { 2194ac27a0ecSDave Kleikamp jbd_debug(1, "Errors on filesystem, " 2195ac27a0ecSDave Kleikamp "clearing orphan list.\n"); 2196ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2197c25f9bc6SEric Sandeen } 2198ac27a0ecSDave Kleikamp jbd_debug(1, "Skipping orphan recovery on fs with errors.\n"); 2199ac27a0ecSDave Kleikamp return; 2200ac27a0ecSDave Kleikamp } 2201ac27a0ecSDave Kleikamp 2202ac27a0ecSDave Kleikamp if (s_flags & MS_RDONLY) { 2203b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "orphan cleanup on readonly fs"); 2204ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 2205ac27a0ecSDave Kleikamp } 2206ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2207ac27a0ecSDave Kleikamp /* Needed for iput() to work correctly and not trash data */ 2208ac27a0ecSDave Kleikamp sb->s_flags |= MS_ACTIVE; 2209ac27a0ecSDave Kleikamp /* Turn on quotas so that they are updated correctly */ 2210ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2211617ba13bSMingming Cao if (EXT4_SB(sb)->s_qf_names[i]) { 2212617ba13bSMingming Cao int ret = ext4_quota_on_mount(sb, i); 2213ac27a0ecSDave Kleikamp if (ret < 0) 2214b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 2215b31e1552SEric Sandeen "Cannot turn on journaled " 2216b31e1552SEric Sandeen "quota: error %d", ret); 2217ac27a0ecSDave Kleikamp } 2218ac27a0ecSDave Kleikamp } 2219ac27a0ecSDave Kleikamp #endif 2220ac27a0ecSDave Kleikamp 2221ac27a0ecSDave Kleikamp while (es->s_last_orphan) { 2222ac27a0ecSDave Kleikamp struct inode *inode; 2223ac27a0ecSDave Kleikamp 222497bd42b9SJosef Bacik inode = ext4_orphan_get(sb, le32_to_cpu(es->s_last_orphan)); 222597bd42b9SJosef Bacik if (IS_ERR(inode)) { 2226ac27a0ecSDave Kleikamp es->s_last_orphan = 0; 2227ac27a0ecSDave Kleikamp break; 2228ac27a0ecSDave Kleikamp } 2229ac27a0ecSDave Kleikamp 2230617ba13bSMingming Cao list_add(&EXT4_I(inode)->i_orphan, &EXT4_SB(sb)->s_orphan); 2231871a2931SChristoph Hellwig dquot_initialize(inode); 2232ac27a0ecSDave Kleikamp if (inode->i_nlink) { 2233566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2234b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2235b31e1552SEric Sandeen "%s: truncating inode %lu to %lld bytes", 223646e665e9SHarvey Harrison __func__, inode->i_ino, inode->i_size); 2237e5f8eab8STheodore Ts'o jbd_debug(2, "truncating inode %lu to %lld bytes\n", 2238ac27a0ecSDave Kleikamp inode->i_ino, inode->i_size); 2239721e3ebaSTheodore Ts'o mutex_lock(&inode->i_mutex); 224055f252c9SLukas Czerner truncate_inode_pages(inode->i_mapping, inode->i_size); 2241617ba13bSMingming Cao ext4_truncate(inode); 2242721e3ebaSTheodore Ts'o mutex_unlock(&inode->i_mutex); 2243ac27a0ecSDave Kleikamp nr_truncates++; 2244ac27a0ecSDave Kleikamp } else { 2245566370a2SPaul Taysom if (test_opt(sb, DEBUG)) 2246b31e1552SEric Sandeen ext4_msg(sb, KERN_DEBUG, 2247b31e1552SEric Sandeen "%s: deleting unreferenced inode %lu", 224846e665e9SHarvey Harrison __func__, inode->i_ino); 2249ac27a0ecSDave Kleikamp jbd_debug(2, "deleting unreferenced inode %lu\n", 2250ac27a0ecSDave Kleikamp inode->i_ino); 2251ac27a0ecSDave Kleikamp nr_orphans++; 2252ac27a0ecSDave Kleikamp } 2253ac27a0ecSDave Kleikamp iput(inode); /* The delete magic happens here! */ 2254ac27a0ecSDave Kleikamp } 2255ac27a0ecSDave Kleikamp 2256ac27a0ecSDave Kleikamp #define PLURAL(x) (x), ((x) == 1) ? "" : "s" 2257ac27a0ecSDave Kleikamp 2258ac27a0ecSDave Kleikamp if (nr_orphans) 2259b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d orphan inode%s deleted", 2260b31e1552SEric Sandeen PLURAL(nr_orphans)); 2261ac27a0ecSDave Kleikamp if (nr_truncates) 2262b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "%d truncate%s cleaned up", 2263b31e1552SEric Sandeen PLURAL(nr_truncates)); 2264ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 2265ac27a0ecSDave Kleikamp /* Turn quotas off */ 2266ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 2267ac27a0ecSDave Kleikamp if (sb_dqopt(sb)->files[i]) 2268287a8095SChristoph Hellwig dquot_quota_off(sb, i); 2269ac27a0ecSDave Kleikamp } 2270ac27a0ecSDave Kleikamp #endif 2271ac27a0ecSDave Kleikamp sb->s_flags = s_flags; /* Restore MS_RDONLY status */ 2272ac27a0ecSDave Kleikamp } 22730b8e58a1SAndreas Dilger 2274cd2291a4SEric Sandeen /* 2275cd2291a4SEric Sandeen * Maximal extent format file size. 2276cd2291a4SEric Sandeen * Resulting logical blkno at s_maxbytes must fit in our on-disk 2277cd2291a4SEric Sandeen * extent format containers, within a sector_t, and within i_blocks 2278cd2291a4SEric Sandeen * in the vfs. ext4 inode has 48 bits of i_block in fsblock units, 2279cd2291a4SEric Sandeen * so that won't be a limiting factor. 2280cd2291a4SEric Sandeen * 2281f17722f9SLukas Czerner * However there is other limiting factor. We do store extents in the form 2282f17722f9SLukas Czerner * of starting block and length, hence the resulting length of the extent 2283f17722f9SLukas Czerner * covering maximum file size must fit into on-disk format containers as 2284f17722f9SLukas Czerner * well. Given that length is always by 1 unit bigger than max unit (because 2285f17722f9SLukas Czerner * we count 0 as well) we have to lower the s_maxbytes by one fs block. 2286f17722f9SLukas Czerner * 2287cd2291a4SEric Sandeen * Note, this does *not* consider any metadata overhead for vfs i_blocks. 2288cd2291a4SEric Sandeen */ 2289f287a1a5STheodore Ts'o static loff_t ext4_max_size(int blkbits, int has_huge_files) 2290cd2291a4SEric Sandeen { 2291cd2291a4SEric Sandeen loff_t res; 2292cd2291a4SEric Sandeen loff_t upper_limit = MAX_LFS_FILESIZE; 2293cd2291a4SEric Sandeen 2294cd2291a4SEric Sandeen /* small i_blocks in vfs inode? */ 2295f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 2296cd2291a4SEric Sandeen /* 229790c699a9SBartlomiej Zolnierkiewicz * CONFIG_LBDAF is not enabled implies the inode 2298cd2291a4SEric Sandeen * i_block represent total blocks in 512 bytes 2299cd2291a4SEric Sandeen * 32 == size of vfs inode i_blocks * 8 2300cd2291a4SEric Sandeen */ 2301cd2291a4SEric Sandeen upper_limit = (1LL << 32) - 1; 2302cd2291a4SEric Sandeen 2303cd2291a4SEric Sandeen /* total blocks in file system block size */ 2304cd2291a4SEric Sandeen upper_limit >>= (blkbits - 9); 2305cd2291a4SEric Sandeen upper_limit <<= blkbits; 2306cd2291a4SEric Sandeen } 2307cd2291a4SEric Sandeen 2308f17722f9SLukas Czerner /* 2309f17722f9SLukas Czerner * 32-bit extent-start container, ee_block. We lower the maxbytes 2310f17722f9SLukas Czerner * by one fs block, so ee_len can cover the extent of maximum file 2311f17722f9SLukas Czerner * size 2312f17722f9SLukas Czerner */ 2313f17722f9SLukas Czerner res = (1LL << 32) - 1; 2314cd2291a4SEric Sandeen res <<= blkbits; 2315cd2291a4SEric Sandeen 2316cd2291a4SEric Sandeen /* Sanity check against vm- & vfs- imposed limits */ 2317cd2291a4SEric Sandeen if (res > upper_limit) 2318cd2291a4SEric Sandeen res = upper_limit; 2319cd2291a4SEric Sandeen 2320cd2291a4SEric Sandeen return res; 2321cd2291a4SEric Sandeen } 2322ac27a0ecSDave Kleikamp 2323ac27a0ecSDave Kleikamp /* 2324cd2291a4SEric Sandeen * Maximal bitmap file size. There is a direct, and {,double-,triple-}indirect 23250fc1b451SAneesh Kumar K.V * block limit, and also a limit of (2^48 - 1) 512-byte sectors in i_blocks. 23260fc1b451SAneesh Kumar K.V * We need to be 1 filesystem block less than the 2^48 sector limit. 2327ac27a0ecSDave Kleikamp */ 2328f287a1a5STheodore Ts'o static loff_t ext4_max_bitmap_size(int bits, int has_huge_files) 2329ac27a0ecSDave Kleikamp { 2330617ba13bSMingming Cao loff_t res = EXT4_NDIR_BLOCKS; 23310fc1b451SAneesh Kumar K.V int meta_blocks; 23320fc1b451SAneesh Kumar K.V loff_t upper_limit; 23330b8e58a1SAndreas Dilger /* This is calculated to be the largest file size for a dense, block 23340b8e58a1SAndreas Dilger * mapped file such that the file's total number of 512-byte sectors, 23350b8e58a1SAndreas Dilger * including data and all indirect blocks, does not exceed (2^48 - 1). 23360b8e58a1SAndreas Dilger * 23370b8e58a1SAndreas Dilger * __u32 i_blocks_lo and _u16 i_blocks_high represent the total 23380b8e58a1SAndreas Dilger * number of 512-byte sectors of the file. 23390fc1b451SAneesh Kumar K.V */ 23400fc1b451SAneesh Kumar K.V 2341f287a1a5STheodore Ts'o if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) { 23420fc1b451SAneesh Kumar K.V /* 234390c699a9SBartlomiej Zolnierkiewicz * !has_huge_files or CONFIG_LBDAF not enabled implies that 23440b8e58a1SAndreas Dilger * the inode i_block field represents total file blocks in 23450b8e58a1SAndreas Dilger * 2^32 512-byte sectors == size of vfs inode i_blocks * 8 23460fc1b451SAneesh Kumar K.V */ 23470fc1b451SAneesh Kumar K.V upper_limit = (1LL << 32) - 1; 23480fc1b451SAneesh Kumar K.V 23490fc1b451SAneesh Kumar K.V /* total blocks in file system block size */ 23500fc1b451SAneesh Kumar K.V upper_limit >>= (bits - 9); 23510fc1b451SAneesh Kumar K.V 23520fc1b451SAneesh Kumar K.V } else { 23538180a562SAneesh Kumar K.V /* 23548180a562SAneesh Kumar K.V * We use 48 bit ext4_inode i_blocks 23558180a562SAneesh Kumar K.V * With EXT4_HUGE_FILE_FL set the i_blocks 23568180a562SAneesh Kumar K.V * represent total number of blocks in 23578180a562SAneesh Kumar K.V * file system block size 23588180a562SAneesh Kumar K.V */ 23590fc1b451SAneesh Kumar K.V upper_limit = (1LL << 48) - 1; 23600fc1b451SAneesh Kumar K.V 23610fc1b451SAneesh Kumar K.V } 23620fc1b451SAneesh Kumar K.V 23630fc1b451SAneesh Kumar K.V /* indirect blocks */ 23640fc1b451SAneesh Kumar K.V meta_blocks = 1; 23650fc1b451SAneesh Kumar K.V /* double indirect blocks */ 23660fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)); 23670fc1b451SAneesh Kumar K.V /* tripple indirect blocks */ 23680fc1b451SAneesh Kumar K.V meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2))); 23690fc1b451SAneesh Kumar K.V 23700fc1b451SAneesh Kumar K.V upper_limit -= meta_blocks; 23710fc1b451SAneesh Kumar K.V upper_limit <<= bits; 2372ac27a0ecSDave Kleikamp 2373ac27a0ecSDave Kleikamp res += 1LL << (bits-2); 2374ac27a0ecSDave Kleikamp res += 1LL << (2*(bits-2)); 2375ac27a0ecSDave Kleikamp res += 1LL << (3*(bits-2)); 2376ac27a0ecSDave Kleikamp res <<= bits; 2377ac27a0ecSDave Kleikamp if (res > upper_limit) 2378ac27a0ecSDave Kleikamp res = upper_limit; 23790fc1b451SAneesh Kumar K.V 23800fc1b451SAneesh Kumar K.V if (res > MAX_LFS_FILESIZE) 23810fc1b451SAneesh Kumar K.V res = MAX_LFS_FILESIZE; 23820fc1b451SAneesh Kumar K.V 2383ac27a0ecSDave Kleikamp return res; 2384ac27a0ecSDave Kleikamp } 2385ac27a0ecSDave Kleikamp 2386617ba13bSMingming Cao static ext4_fsblk_t descriptor_loc(struct super_block *sb, 238770bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block, int nr) 2388ac27a0ecSDave Kleikamp { 2389617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 2390fd2d4291SAvantika Mathur ext4_group_t bg, first_meta_bg; 2391ac27a0ecSDave Kleikamp int has_super = 0; 2392ac27a0ecSDave Kleikamp 2393ac27a0ecSDave Kleikamp first_meta_bg = le32_to_cpu(sbi->s_es->s_first_meta_bg); 2394ac27a0ecSDave Kleikamp 2395617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_META_BG) || 2396ac27a0ecSDave Kleikamp nr < first_meta_bg) 239770bbb3e0SAndrew Morton return logical_sb_block + nr + 1; 2398ac27a0ecSDave Kleikamp bg = sbi->s_desc_per_block * nr; 2399617ba13bSMingming Cao if (ext4_bg_has_super(sb, bg)) 2400ac27a0ecSDave Kleikamp has_super = 1; 24010b8e58a1SAndreas Dilger 2402617ba13bSMingming Cao return (has_super + ext4_group_first_block_no(sb, bg)); 2403ac27a0ecSDave Kleikamp } 2404ac27a0ecSDave Kleikamp 2405c9de560dSAlex Tomas /** 2406c9de560dSAlex Tomas * ext4_get_stripe_size: Get the stripe size. 2407c9de560dSAlex Tomas * @sbi: In memory super block info 2408c9de560dSAlex Tomas * 2409c9de560dSAlex Tomas * If we have specified it via mount option, then 2410c9de560dSAlex Tomas * use the mount option value. If the value specified at mount time is 2411c9de560dSAlex Tomas * greater than the blocks per group use the super block value. 2412c9de560dSAlex Tomas * If the super block value is greater than blocks per group return 0. 2413c9de560dSAlex Tomas * Allocator needs it be less than blocks per group. 2414c9de560dSAlex Tomas * 2415c9de560dSAlex Tomas */ 2416c9de560dSAlex Tomas static unsigned long ext4_get_stripe_size(struct ext4_sb_info *sbi) 2417c9de560dSAlex Tomas { 2418c9de560dSAlex Tomas unsigned long stride = le16_to_cpu(sbi->s_es->s_raid_stride); 2419c9de560dSAlex Tomas unsigned long stripe_width = 2420c9de560dSAlex Tomas le32_to_cpu(sbi->s_es->s_raid_stripe_width); 24213eb08658SDan Ehrenberg int ret; 2422c9de560dSAlex Tomas 2423c9de560dSAlex Tomas if (sbi->s_stripe && sbi->s_stripe <= sbi->s_blocks_per_group) 24243eb08658SDan Ehrenberg ret = sbi->s_stripe; 24253eb08658SDan Ehrenberg else if (stripe_width <= sbi->s_blocks_per_group) 24263eb08658SDan Ehrenberg ret = stripe_width; 24273eb08658SDan Ehrenberg else if (stride <= sbi->s_blocks_per_group) 24283eb08658SDan Ehrenberg ret = stride; 24293eb08658SDan Ehrenberg else 24303eb08658SDan Ehrenberg ret = 0; 2431c9de560dSAlex Tomas 24323eb08658SDan Ehrenberg /* 24333eb08658SDan Ehrenberg * If the stripe width is 1, this makes no sense and 24343eb08658SDan Ehrenberg * we set it to 0 to turn off stripe handling code. 24353eb08658SDan Ehrenberg */ 24363eb08658SDan Ehrenberg if (ret <= 1) 24373eb08658SDan Ehrenberg ret = 0; 2438c9de560dSAlex Tomas 24393eb08658SDan Ehrenberg return ret; 2440c9de560dSAlex Tomas } 2441ac27a0ecSDave Kleikamp 24423197ebdbSTheodore Ts'o /* sysfs supprt */ 24433197ebdbSTheodore Ts'o 24443197ebdbSTheodore Ts'o struct ext4_attr { 24453197ebdbSTheodore Ts'o struct attribute attr; 24463197ebdbSTheodore Ts'o ssize_t (*show)(struct ext4_attr *, struct ext4_sb_info *, char *); 24473197ebdbSTheodore Ts'o ssize_t (*store)(struct ext4_attr *, struct ext4_sb_info *, 24483197ebdbSTheodore Ts'o const char *, size_t); 2449f2d50a65SJan Kara union { 24503197ebdbSTheodore Ts'o int offset; 2451f2d50a65SJan Kara int deprecated_val; 2452f2d50a65SJan Kara } u; 24533197ebdbSTheodore Ts'o }; 24543197ebdbSTheodore Ts'o 245527dd4385SLukas Czerner static int parse_strtoull(const char *buf, 245627dd4385SLukas Czerner unsigned long long max, unsigned long long *value) 245727dd4385SLukas Czerner { 245827dd4385SLukas Czerner int ret; 245927dd4385SLukas Czerner 246027dd4385SLukas Czerner ret = kstrtoull(skip_spaces(buf), 0, value); 246127dd4385SLukas Czerner if (!ret && *value > max) 246227dd4385SLukas Czerner ret = -EINVAL; 246327dd4385SLukas Czerner return ret; 246427dd4385SLukas Czerner } 246527dd4385SLukas Czerner 24663197ebdbSTheodore Ts'o static ssize_t delayed_allocation_blocks_show(struct ext4_attr *a, 24673197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 24683197ebdbSTheodore Ts'o char *buf) 24693197ebdbSTheodore Ts'o { 24703197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 24717b415bf6SAditya Kali (s64) EXT4_C2B(sbi, 24727b415bf6SAditya Kali percpu_counter_sum(&sbi->s_dirtyclusters_counter))); 24733197ebdbSTheodore Ts'o } 24743197ebdbSTheodore Ts'o 24753197ebdbSTheodore Ts'o static ssize_t session_write_kbytes_show(struct ext4_attr *a, 24763197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24773197ebdbSTheodore Ts'o { 24783197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24793197ebdbSTheodore Ts'o 2480f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2481f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24823197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%lu\n", 24833197ebdbSTheodore Ts'o (part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 24843197ebdbSTheodore Ts'o sbi->s_sectors_written_start) >> 1); 24853197ebdbSTheodore Ts'o } 24863197ebdbSTheodore Ts'o 24873197ebdbSTheodore Ts'o static ssize_t lifetime_write_kbytes_show(struct ext4_attr *a, 24883197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 24893197ebdbSTheodore Ts'o { 24903197ebdbSTheodore Ts'o struct super_block *sb = sbi->s_buddy_cache->i_sb; 24913197ebdbSTheodore Ts'o 2492f613dfcbSTheodore Ts'o if (!sb->s_bdev->bd_part) 2493f613dfcbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "0\n"); 24943197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%llu\n", 2495a6b43e38SAndrew Morton (unsigned long long)(sbi->s_kbytes_written + 24963197ebdbSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 2497a6b43e38SAndrew Morton EXT4_SB(sb)->s_sectors_written_start) >> 1))); 24983197ebdbSTheodore Ts'o } 24993197ebdbSTheodore Ts'o 25003197ebdbSTheodore Ts'o static ssize_t inode_readahead_blks_store(struct ext4_attr *a, 25013197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25023197ebdbSTheodore Ts'o const char *buf, size_t count) 25033197ebdbSTheodore Ts'o { 25043197ebdbSTheodore Ts'o unsigned long t; 2505e1091b15SLukas Czerner int ret; 25063197ebdbSTheodore Ts'o 2507e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2508e1091b15SLukas Czerner if (ret) 2509e1091b15SLukas Czerner return ret; 25103197ebdbSTheodore Ts'o 2511e1091b15SLukas Czerner if (t && (!is_power_of_2(t) || t > 0x40000000)) 25123197ebdbSTheodore Ts'o return -EINVAL; 25133197ebdbSTheodore Ts'o 25143197ebdbSTheodore Ts'o sbi->s_inode_readahead_blks = t; 25153197ebdbSTheodore Ts'o return count; 25163197ebdbSTheodore Ts'o } 25173197ebdbSTheodore Ts'o 25183197ebdbSTheodore Ts'o static ssize_t sbi_ui_show(struct ext4_attr *a, 25193197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, char *buf) 25203197ebdbSTheodore Ts'o { 2521f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25223197ebdbSTheodore Ts'o 25233197ebdbSTheodore Ts'o return snprintf(buf, PAGE_SIZE, "%u\n", *ui); 25243197ebdbSTheodore Ts'o } 25253197ebdbSTheodore Ts'o 25263197ebdbSTheodore Ts'o static ssize_t sbi_ui_store(struct ext4_attr *a, 25273197ebdbSTheodore Ts'o struct ext4_sb_info *sbi, 25283197ebdbSTheodore Ts'o const char *buf, size_t count) 25293197ebdbSTheodore Ts'o { 2530f2d50a65SJan Kara unsigned int *ui = (unsigned int *) (((char *) sbi) + a->u.offset); 25313197ebdbSTheodore Ts'o unsigned long t; 2532e1091b15SLukas Czerner int ret; 25333197ebdbSTheodore Ts'o 2534e1091b15SLukas Czerner ret = kstrtoul(skip_spaces(buf), 0, &t); 2535e1091b15SLukas Czerner if (ret) 2536e1091b15SLukas Czerner return ret; 25373197ebdbSTheodore Ts'o *ui = t; 25383197ebdbSTheodore Ts'o return count; 25393197ebdbSTheodore Ts'o } 25403197ebdbSTheodore Ts'o 254127dd4385SLukas Czerner static ssize_t reserved_clusters_show(struct ext4_attr *a, 254227dd4385SLukas Czerner struct ext4_sb_info *sbi, char *buf) 254327dd4385SLukas Czerner { 254427dd4385SLukas Czerner return snprintf(buf, PAGE_SIZE, "%llu\n", 254527dd4385SLukas Czerner (unsigned long long) atomic64_read(&sbi->s_resv_clusters)); 254627dd4385SLukas Czerner } 254727dd4385SLukas Czerner 254827dd4385SLukas Czerner static ssize_t reserved_clusters_store(struct ext4_attr *a, 254927dd4385SLukas Czerner struct ext4_sb_info *sbi, 255027dd4385SLukas Czerner const char *buf, size_t count) 255127dd4385SLukas Czerner { 255227dd4385SLukas Czerner unsigned long long val; 255327dd4385SLukas Czerner int ret; 255427dd4385SLukas Czerner 255527dd4385SLukas Czerner if (parse_strtoull(buf, -1ULL, &val)) 255627dd4385SLukas Czerner return -EINVAL; 255727dd4385SLukas Czerner ret = ext4_reserve_clusters(sbi, val); 255827dd4385SLukas Czerner 255927dd4385SLukas Czerner return ret ? ret : count; 256027dd4385SLukas Czerner } 256127dd4385SLukas Czerner 25622c0544b2STheodore Ts'o static ssize_t trigger_test_error(struct ext4_attr *a, 25632c0544b2STheodore Ts'o struct ext4_sb_info *sbi, 25642c0544b2STheodore Ts'o const char *buf, size_t count) 25652c0544b2STheodore Ts'o { 25662c0544b2STheodore Ts'o int len = count; 25672c0544b2STheodore Ts'o 25682c0544b2STheodore Ts'o if (!capable(CAP_SYS_ADMIN)) 25692c0544b2STheodore Ts'o return -EPERM; 25702c0544b2STheodore Ts'o 25712c0544b2STheodore Ts'o if (len && buf[len-1] == '\n') 25722c0544b2STheodore Ts'o len--; 25732c0544b2STheodore Ts'o 25742c0544b2STheodore Ts'o if (len) 25752c0544b2STheodore Ts'o ext4_error(sbi->s_sb, "%.*s", len, buf); 25762c0544b2STheodore Ts'o return count; 25772c0544b2STheodore Ts'o } 25782c0544b2STheodore Ts'o 2579f2d50a65SJan Kara static ssize_t sbi_deprecated_show(struct ext4_attr *a, 2580f2d50a65SJan Kara struct ext4_sb_info *sbi, char *buf) 2581f2d50a65SJan Kara { 2582f2d50a65SJan Kara return snprintf(buf, PAGE_SIZE, "%d\n", a->u.deprecated_val); 2583f2d50a65SJan Kara } 2584f2d50a65SJan Kara 25853197ebdbSTheodore Ts'o #define EXT4_ATTR_OFFSET(_name,_mode,_show,_store,_elname) \ 25863197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##_name = { \ 25873197ebdbSTheodore Ts'o .attr = {.name = __stringify(_name), .mode = _mode }, \ 25883197ebdbSTheodore Ts'o .show = _show, \ 25893197ebdbSTheodore Ts'o .store = _store, \ 2590f2d50a65SJan Kara .u = { \ 25913197ebdbSTheodore Ts'o .offset = offsetof(struct ext4_sb_info, _elname),\ 2592f2d50a65SJan Kara }, \ 25933197ebdbSTheodore Ts'o } 25943197ebdbSTheodore Ts'o #define EXT4_ATTR(name, mode, show, store) \ 25953197ebdbSTheodore Ts'o static struct ext4_attr ext4_attr_##name = __ATTR(name, mode, show, store) 25963197ebdbSTheodore Ts'o 2597857ac889SLukas Czerner #define EXT4_INFO_ATTR(name) EXT4_ATTR(name, 0444, NULL, NULL) 25983197ebdbSTheodore Ts'o #define EXT4_RO_ATTR(name) EXT4_ATTR(name, 0444, name##_show, NULL) 25993197ebdbSTheodore Ts'o #define EXT4_RW_ATTR(name) EXT4_ATTR(name, 0644, name##_show, name##_store) 26003197ebdbSTheodore Ts'o #define EXT4_RW_ATTR_SBI_UI(name, elname) \ 26013197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(name, 0644, sbi_ui_show, sbi_ui_store, elname) 26023197ebdbSTheodore Ts'o #define ATTR_LIST(name) &ext4_attr_##name.attr 2603f2d50a65SJan Kara #define EXT4_DEPRECATED_ATTR(_name, _val) \ 2604f2d50a65SJan Kara static struct ext4_attr ext4_attr_##_name = { \ 2605f2d50a65SJan Kara .attr = {.name = __stringify(_name), .mode = 0444 }, \ 2606f2d50a65SJan Kara .show = sbi_deprecated_show, \ 2607f2d50a65SJan Kara .u = { \ 2608f2d50a65SJan Kara .deprecated_val = _val, \ 2609f2d50a65SJan Kara }, \ 2610f2d50a65SJan Kara } 26113197ebdbSTheodore Ts'o 26123197ebdbSTheodore Ts'o EXT4_RO_ATTR(delayed_allocation_blocks); 26133197ebdbSTheodore Ts'o EXT4_RO_ATTR(session_write_kbytes); 26143197ebdbSTheodore Ts'o EXT4_RO_ATTR(lifetime_write_kbytes); 261527dd4385SLukas Czerner EXT4_RW_ATTR(reserved_clusters); 26163197ebdbSTheodore Ts'o EXT4_ATTR_OFFSET(inode_readahead_blks, 0644, sbi_ui_show, 26173197ebdbSTheodore Ts'o inode_readahead_blks_store, s_inode_readahead_blks); 261811013911SAndreas Dilger EXT4_RW_ATTR_SBI_UI(inode_goal, s_inode_goal); 26193197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stats, s_mb_stats); 26203197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_max_to_scan, s_mb_max_to_scan); 26213197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_min_to_scan, s_mb_min_to_scan); 26223197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_order2_req, s_mb_order2_reqs); 26233197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_stream_req, s_mb_stream_request); 26243197ebdbSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(mb_group_prealloc, s_mb_group_prealloc); 2625f2d50a65SJan Kara EXT4_DEPRECATED_ATTR(max_writeback_mb_bump, 128); 262667a5da56SZheng Liu EXT4_RW_ATTR_SBI_UI(extent_max_zeroout_kb, s_extent_max_zeroout_kb); 26272c0544b2STheodore Ts'o EXT4_ATTR(trigger_fs_error, 0200, NULL, trigger_test_error); 2628efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_interval_ms, s_err_ratelimit_state.interval); 2629efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(err_ratelimit_burst, s_err_ratelimit_state.burst); 2630efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_interval_ms, s_warning_ratelimit_state.interval); 2631efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(warning_ratelimit_burst, s_warning_ratelimit_state.burst); 2632efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_interval_ms, s_msg_ratelimit_state.interval); 2633efbed4dcSTheodore Ts'o EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst); 26343197ebdbSTheodore Ts'o 26353197ebdbSTheodore Ts'o static struct attribute *ext4_attrs[] = { 26363197ebdbSTheodore Ts'o ATTR_LIST(delayed_allocation_blocks), 26373197ebdbSTheodore Ts'o ATTR_LIST(session_write_kbytes), 26383197ebdbSTheodore Ts'o ATTR_LIST(lifetime_write_kbytes), 263927dd4385SLukas Czerner ATTR_LIST(reserved_clusters), 26403197ebdbSTheodore Ts'o ATTR_LIST(inode_readahead_blks), 264111013911SAndreas Dilger ATTR_LIST(inode_goal), 26423197ebdbSTheodore Ts'o ATTR_LIST(mb_stats), 26433197ebdbSTheodore Ts'o ATTR_LIST(mb_max_to_scan), 26443197ebdbSTheodore Ts'o ATTR_LIST(mb_min_to_scan), 26453197ebdbSTheodore Ts'o ATTR_LIST(mb_order2_req), 26463197ebdbSTheodore Ts'o ATTR_LIST(mb_stream_req), 26473197ebdbSTheodore Ts'o ATTR_LIST(mb_group_prealloc), 264855138e0bSTheodore Ts'o ATTR_LIST(max_writeback_mb_bump), 264967a5da56SZheng Liu ATTR_LIST(extent_max_zeroout_kb), 26502c0544b2STheodore Ts'o ATTR_LIST(trigger_fs_error), 2651efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_interval_ms), 2652efbed4dcSTheodore Ts'o ATTR_LIST(err_ratelimit_burst), 2653efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_interval_ms), 2654efbed4dcSTheodore Ts'o ATTR_LIST(warning_ratelimit_burst), 2655efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_interval_ms), 2656efbed4dcSTheodore Ts'o ATTR_LIST(msg_ratelimit_burst), 26573197ebdbSTheodore Ts'o NULL, 26583197ebdbSTheodore Ts'o }; 26593197ebdbSTheodore Ts'o 2660857ac889SLukas Czerner /* Features this copy of ext4 supports */ 2661857ac889SLukas Czerner EXT4_INFO_ATTR(lazy_itable_init); 266227ee40dfSLukas Czerner EXT4_INFO_ATTR(batched_discard); 26635e7bbef1STheodore Ts'o EXT4_INFO_ATTR(meta_bg_resize); 2664857ac889SLukas Czerner 2665857ac889SLukas Czerner static struct attribute *ext4_feat_attrs[] = { 2666857ac889SLukas Czerner ATTR_LIST(lazy_itable_init), 266727ee40dfSLukas Czerner ATTR_LIST(batched_discard), 26685e7bbef1STheodore Ts'o ATTR_LIST(meta_bg_resize), 2669857ac889SLukas Czerner NULL, 2670857ac889SLukas Czerner }; 2671857ac889SLukas Czerner 26723197ebdbSTheodore Ts'o static ssize_t ext4_attr_show(struct kobject *kobj, 26733197ebdbSTheodore Ts'o struct attribute *attr, char *buf) 26743197ebdbSTheodore Ts'o { 26753197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26763197ebdbSTheodore Ts'o s_kobj); 26773197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 26783197ebdbSTheodore Ts'o 26793197ebdbSTheodore Ts'o return a->show ? a->show(a, sbi, buf) : 0; 26803197ebdbSTheodore Ts'o } 26813197ebdbSTheodore Ts'o 26823197ebdbSTheodore Ts'o static ssize_t ext4_attr_store(struct kobject *kobj, 26833197ebdbSTheodore Ts'o struct attribute *attr, 26843197ebdbSTheodore Ts'o const char *buf, size_t len) 26853197ebdbSTheodore Ts'o { 26863197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26873197ebdbSTheodore Ts'o s_kobj); 26883197ebdbSTheodore Ts'o struct ext4_attr *a = container_of(attr, struct ext4_attr, attr); 26893197ebdbSTheodore Ts'o 26903197ebdbSTheodore Ts'o return a->store ? a->store(a, sbi, buf, len) : 0; 26913197ebdbSTheodore Ts'o } 26923197ebdbSTheodore Ts'o 26933197ebdbSTheodore Ts'o static void ext4_sb_release(struct kobject *kobj) 26943197ebdbSTheodore Ts'o { 26953197ebdbSTheodore Ts'o struct ext4_sb_info *sbi = container_of(kobj, struct ext4_sb_info, 26963197ebdbSTheodore Ts'o s_kobj); 26973197ebdbSTheodore Ts'o complete(&sbi->s_kobj_unregister); 26983197ebdbSTheodore Ts'o } 26993197ebdbSTheodore Ts'o 270052cf25d0SEmese Revfy static const struct sysfs_ops ext4_attr_ops = { 27013197ebdbSTheodore Ts'o .show = ext4_attr_show, 27023197ebdbSTheodore Ts'o .store = ext4_attr_store, 27033197ebdbSTheodore Ts'o }; 27043197ebdbSTheodore Ts'o 27053197ebdbSTheodore Ts'o static struct kobj_type ext4_ktype = { 27063197ebdbSTheodore Ts'o .default_attrs = ext4_attrs, 27073197ebdbSTheodore Ts'o .sysfs_ops = &ext4_attr_ops, 27083197ebdbSTheodore Ts'o .release = ext4_sb_release, 27093197ebdbSTheodore Ts'o }; 27103197ebdbSTheodore Ts'o 2711857ac889SLukas Czerner static void ext4_feat_release(struct kobject *kobj) 2712857ac889SLukas Czerner { 2713857ac889SLukas Czerner complete(&ext4_feat->f_kobj_unregister); 2714857ac889SLukas Czerner } 2715857ac889SLukas Czerner 2716857ac889SLukas Czerner static struct kobj_type ext4_feat_ktype = { 2717857ac889SLukas Czerner .default_attrs = ext4_feat_attrs, 2718857ac889SLukas Czerner .sysfs_ops = &ext4_attr_ops, 2719857ac889SLukas Czerner .release = ext4_feat_release, 2720857ac889SLukas Czerner }; 2721857ac889SLukas Czerner 2722a13fb1a4SEric Sandeen /* 2723a13fb1a4SEric Sandeen * Check whether this filesystem can be mounted based on 2724a13fb1a4SEric Sandeen * the features present and the RDONLY/RDWR mount requested. 2725a13fb1a4SEric Sandeen * Returns 1 if this filesystem can be mounted as requested, 2726a13fb1a4SEric Sandeen * 0 if it cannot be. 2727a13fb1a4SEric Sandeen */ 2728a13fb1a4SEric Sandeen static int ext4_feature_set_ok(struct super_block *sb, int readonly) 2729a13fb1a4SEric Sandeen { 2730a13fb1a4SEric Sandeen if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT4_FEATURE_INCOMPAT_SUPP)) { 2731a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, 2732a13fb1a4SEric Sandeen "Couldn't mount because of " 2733a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2734a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_incompat) & 2735a13fb1a4SEric Sandeen ~EXT4_FEATURE_INCOMPAT_SUPP)); 2736a13fb1a4SEric Sandeen return 0; 2737a13fb1a4SEric Sandeen } 2738a13fb1a4SEric Sandeen 2739a13fb1a4SEric Sandeen if (readonly) 2740a13fb1a4SEric Sandeen return 1; 2741a13fb1a4SEric Sandeen 2742a13fb1a4SEric Sandeen /* Check that feature set is OK for a read-write mount */ 2743a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT4_FEATURE_RO_COMPAT_SUPP)) { 2744a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't mount RDWR because of " 2745a13fb1a4SEric Sandeen "unsupported optional features (%x)", 2746a13fb1a4SEric Sandeen (le32_to_cpu(EXT4_SB(sb)->s_es->s_feature_ro_compat) & 2747a13fb1a4SEric Sandeen ~EXT4_FEATURE_RO_COMPAT_SUPP)); 2748a13fb1a4SEric Sandeen return 0; 2749a13fb1a4SEric Sandeen } 2750a13fb1a4SEric Sandeen /* 2751a13fb1a4SEric Sandeen * Large file size enabled file system can only be mounted 2752a13fb1a4SEric Sandeen * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF 2753a13fb1a4SEric Sandeen */ 2754a13fb1a4SEric Sandeen if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_HUGE_FILE)) { 2755a13fb1a4SEric Sandeen if (sizeof(blkcnt_t) < sizeof(u64)) { 2756a13fb1a4SEric Sandeen ext4_msg(sb, KERN_ERR, "Filesystem with huge files " 2757a13fb1a4SEric Sandeen "cannot be mounted RDWR without " 2758a13fb1a4SEric Sandeen "CONFIG_LBDAF"); 2759a13fb1a4SEric Sandeen return 0; 2760a13fb1a4SEric Sandeen } 2761a13fb1a4SEric Sandeen } 2762bab08ab9STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC) && 2763bab08ab9STheodore Ts'o !EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) { 2764bab08ab9STheodore Ts'o ext4_msg(sb, KERN_ERR, 2765bab08ab9STheodore Ts'o "Can't support bigalloc feature without " 2766bab08ab9STheodore Ts'o "extents feature\n"); 2767bab08ab9STheodore Ts'o return 0; 2768bab08ab9STheodore Ts'o } 27697c319d32SAditya Kali 27707c319d32SAditya Kali #ifndef CONFIG_QUOTA 27717c319d32SAditya Kali if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 27727c319d32SAditya Kali !readonly) { 27737c319d32SAditya Kali ext4_msg(sb, KERN_ERR, 27747c319d32SAditya Kali "Filesystem with quota feature cannot be mounted RDWR " 27757c319d32SAditya Kali "without CONFIG_QUOTA"); 27767c319d32SAditya Kali return 0; 27777c319d32SAditya Kali } 27787c319d32SAditya Kali #endif /* CONFIG_QUOTA */ 2779a13fb1a4SEric Sandeen return 1; 2780a13fb1a4SEric Sandeen } 2781a13fb1a4SEric Sandeen 278266e61a9eSTheodore Ts'o /* 278366e61a9eSTheodore Ts'o * This function is called once a day if we have errors logged 278466e61a9eSTheodore Ts'o * on the file system 278566e61a9eSTheodore Ts'o */ 278666e61a9eSTheodore Ts'o static void print_daily_error_info(unsigned long arg) 278766e61a9eSTheodore Ts'o { 278866e61a9eSTheodore Ts'o struct super_block *sb = (struct super_block *) arg; 278966e61a9eSTheodore Ts'o struct ext4_sb_info *sbi; 279066e61a9eSTheodore Ts'o struct ext4_super_block *es; 279166e61a9eSTheodore Ts'o 279266e61a9eSTheodore Ts'o sbi = EXT4_SB(sb); 279366e61a9eSTheodore Ts'o es = sbi->s_es; 279466e61a9eSTheodore Ts'o 279566e61a9eSTheodore Ts'o if (es->s_error_count) 279666e61a9eSTheodore Ts'o ext4_msg(sb, KERN_NOTICE, "error count: %u", 279766e61a9eSTheodore Ts'o le32_to_cpu(es->s_error_count)); 279866e61a9eSTheodore Ts'o if (es->s_first_error_time) { 279966e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): initial error at %u: %.*s:%d", 280066e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_first_error_time), 280166e61a9eSTheodore Ts'o (int) sizeof(es->s_first_error_func), 280266e61a9eSTheodore Ts'o es->s_first_error_func, 280366e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_line)); 280466e61a9eSTheodore Ts'o if (es->s_first_error_ino) 280566e61a9eSTheodore Ts'o printk(": inode %u", 280666e61a9eSTheodore Ts'o le32_to_cpu(es->s_first_error_ino)); 280766e61a9eSTheodore Ts'o if (es->s_first_error_block) 280866e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 280966e61a9eSTheodore Ts'o le64_to_cpu(es->s_first_error_block)); 281066e61a9eSTheodore Ts'o printk("\n"); 281166e61a9eSTheodore Ts'o } 281266e61a9eSTheodore Ts'o if (es->s_last_error_time) { 281366e61a9eSTheodore Ts'o printk(KERN_NOTICE "EXT4-fs (%s): last error at %u: %.*s:%d", 281466e61a9eSTheodore Ts'o sb->s_id, le32_to_cpu(es->s_last_error_time), 281566e61a9eSTheodore Ts'o (int) sizeof(es->s_last_error_func), 281666e61a9eSTheodore Ts'o es->s_last_error_func, 281766e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_line)); 281866e61a9eSTheodore Ts'o if (es->s_last_error_ino) 281966e61a9eSTheodore Ts'o printk(": inode %u", 282066e61a9eSTheodore Ts'o le32_to_cpu(es->s_last_error_ino)); 282166e61a9eSTheodore Ts'o if (es->s_last_error_block) 282266e61a9eSTheodore Ts'o printk(": block %llu", (unsigned long long) 282366e61a9eSTheodore Ts'o le64_to_cpu(es->s_last_error_block)); 282466e61a9eSTheodore Ts'o printk("\n"); 282566e61a9eSTheodore Ts'o } 282666e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 24*60*60*HZ); /* Once a day */ 282766e61a9eSTheodore Ts'o } 282866e61a9eSTheodore Ts'o 2829bfff6873SLukas Czerner /* Find next suitable group and run ext4_init_inode_table */ 2830bfff6873SLukas Czerner static int ext4_run_li_request(struct ext4_li_request *elr) 2831bfff6873SLukas Czerner { 2832bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 2833bfff6873SLukas Czerner ext4_group_t group, ngroups; 2834bfff6873SLukas Czerner struct super_block *sb; 2835bfff6873SLukas Czerner unsigned long timeout = 0; 2836bfff6873SLukas Czerner int ret = 0; 2837bfff6873SLukas Czerner 2838bfff6873SLukas Czerner sb = elr->lr_super; 2839bfff6873SLukas Czerner ngroups = EXT4_SB(sb)->s_groups_count; 2840bfff6873SLukas Czerner 28418e8ad8a5SJan Kara sb_start_write(sb); 2842bfff6873SLukas Czerner for (group = elr->lr_next_group; group < ngroups; group++) { 2843bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 2844bfff6873SLukas Czerner if (!gdp) { 2845bfff6873SLukas Czerner ret = 1; 2846bfff6873SLukas Czerner break; 2847bfff6873SLukas Czerner } 2848bfff6873SLukas Czerner 2849bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 2850bfff6873SLukas Czerner break; 2851bfff6873SLukas Czerner } 2852bfff6873SLukas Czerner 28537f511862STheodore Ts'o if (group >= ngroups) 2854bfff6873SLukas Czerner ret = 1; 2855bfff6873SLukas Czerner 2856bfff6873SLukas Czerner if (!ret) { 2857bfff6873SLukas Czerner timeout = jiffies; 2858bfff6873SLukas Czerner ret = ext4_init_inode_table(sb, group, 2859bfff6873SLukas Czerner elr->lr_timeout ? 0 : 1); 2860bfff6873SLukas Czerner if (elr->lr_timeout == 0) { 286151ce6511SLukas Czerner timeout = (jiffies - timeout) * 286251ce6511SLukas Czerner elr->lr_sbi->s_li_wait_mult; 2863bfff6873SLukas Czerner elr->lr_timeout = timeout; 2864bfff6873SLukas Czerner } 2865bfff6873SLukas Czerner elr->lr_next_sched = jiffies + elr->lr_timeout; 2866bfff6873SLukas Czerner elr->lr_next_group = group + 1; 2867bfff6873SLukas Czerner } 28688e8ad8a5SJan Kara sb_end_write(sb); 2869bfff6873SLukas Czerner 2870bfff6873SLukas Czerner return ret; 2871bfff6873SLukas Czerner } 2872bfff6873SLukas Czerner 2873bfff6873SLukas Czerner /* 2874bfff6873SLukas Czerner * Remove lr_request from the list_request and free the 28754ed5c033SLukas Czerner * request structure. Should be called with li_list_mtx held 2876bfff6873SLukas Czerner */ 2877bfff6873SLukas Czerner static void ext4_remove_li_request(struct ext4_li_request *elr) 2878bfff6873SLukas Czerner { 2879bfff6873SLukas Czerner struct ext4_sb_info *sbi; 2880bfff6873SLukas Czerner 2881bfff6873SLukas Czerner if (!elr) 2882bfff6873SLukas Czerner return; 2883bfff6873SLukas Czerner 2884bfff6873SLukas Czerner sbi = elr->lr_sbi; 2885bfff6873SLukas Czerner 2886bfff6873SLukas Czerner list_del(&elr->lr_request); 2887bfff6873SLukas Czerner sbi->s_li_request = NULL; 2888bfff6873SLukas Czerner kfree(elr); 2889bfff6873SLukas Czerner } 2890bfff6873SLukas Czerner 2891bfff6873SLukas Czerner static void ext4_unregister_li_request(struct super_block *sb) 2892bfff6873SLukas Czerner { 28931bb933fbSLukas Czerner mutex_lock(&ext4_li_mtx); 28941bb933fbSLukas Czerner if (!ext4_li_info) { 28951bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2896bfff6873SLukas Czerner return; 28971bb933fbSLukas Czerner } 2898bfff6873SLukas Czerner 2899bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 29001bb933fbSLukas Czerner ext4_remove_li_request(EXT4_SB(sb)->s_li_request); 2901bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 29021bb933fbSLukas Czerner mutex_unlock(&ext4_li_mtx); 2903bfff6873SLukas Czerner } 2904bfff6873SLukas Czerner 29058f1f7453SEric Sandeen static struct task_struct *ext4_lazyinit_task; 29068f1f7453SEric Sandeen 2907bfff6873SLukas Czerner /* 2908bfff6873SLukas Czerner * This is the function where ext4lazyinit thread lives. It walks 2909bfff6873SLukas Czerner * through the request list searching for next scheduled filesystem. 2910bfff6873SLukas Czerner * When such a fs is found, run the lazy initialization request 2911bfff6873SLukas Czerner * (ext4_rn_li_request) and keep track of the time spend in this 2912bfff6873SLukas Czerner * function. Based on that time we compute next schedule time of 2913bfff6873SLukas Czerner * the request. When walking through the list is complete, compute 2914bfff6873SLukas Czerner * next waking time and put itself into sleep. 2915bfff6873SLukas Czerner */ 2916bfff6873SLukas Czerner static int ext4_lazyinit_thread(void *arg) 2917bfff6873SLukas Czerner { 2918bfff6873SLukas Czerner struct ext4_lazy_init *eli = (struct ext4_lazy_init *)arg; 2919bfff6873SLukas Czerner struct list_head *pos, *n; 2920bfff6873SLukas Czerner struct ext4_li_request *elr; 29214ed5c033SLukas Czerner unsigned long next_wakeup, cur; 2922bfff6873SLukas Czerner 2923bfff6873SLukas Czerner BUG_ON(NULL == eli); 2924bfff6873SLukas Czerner 2925bfff6873SLukas Czerner cont_thread: 2926bfff6873SLukas Czerner while (true) { 2927bfff6873SLukas Czerner next_wakeup = MAX_JIFFY_OFFSET; 2928bfff6873SLukas Czerner 2929bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2930bfff6873SLukas Czerner if (list_empty(&eli->li_request_list)) { 2931bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2932bfff6873SLukas Czerner goto exit_thread; 2933bfff6873SLukas Czerner } 2934bfff6873SLukas Czerner 2935bfff6873SLukas Czerner list_for_each_safe(pos, n, &eli->li_request_list) { 2936bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 2937bfff6873SLukas Czerner lr_request); 2938bfff6873SLukas Czerner 2939b2c78cd0STheodore Ts'o if (time_after_eq(jiffies, elr->lr_next_sched)) { 2940b2c78cd0STheodore Ts'o if (ext4_run_li_request(elr) != 0) { 2941b2c78cd0STheodore Ts'o /* error, remove the lazy_init job */ 2942bfff6873SLukas Czerner ext4_remove_li_request(elr); 2943bfff6873SLukas Czerner continue; 2944bfff6873SLukas Czerner } 2945b2c78cd0STheodore Ts'o } 2946bfff6873SLukas Czerner 2947bfff6873SLukas Czerner if (time_before(elr->lr_next_sched, next_wakeup)) 2948bfff6873SLukas Czerner next_wakeup = elr->lr_next_sched; 2949bfff6873SLukas Czerner } 2950bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2951bfff6873SLukas Czerner 2952a0acae0eSTejun Heo try_to_freeze(); 2953bfff6873SLukas Czerner 29544ed5c033SLukas Czerner cur = jiffies; 29554ed5c033SLukas Czerner if ((time_after_eq(cur, next_wakeup)) || 2956f4245bd4SLukas Czerner (MAX_JIFFY_OFFSET == next_wakeup)) { 2957bfff6873SLukas Czerner cond_resched(); 2958bfff6873SLukas Czerner continue; 2959bfff6873SLukas Czerner } 2960bfff6873SLukas Czerner 29614ed5c033SLukas Czerner schedule_timeout_interruptible(next_wakeup - cur); 29624ed5c033SLukas Czerner 29638f1f7453SEric Sandeen if (kthread_should_stop()) { 29648f1f7453SEric Sandeen ext4_clear_request_list(); 29658f1f7453SEric Sandeen goto exit_thread; 29668f1f7453SEric Sandeen } 2967bfff6873SLukas Czerner } 2968bfff6873SLukas Czerner 2969bfff6873SLukas Czerner exit_thread: 2970bfff6873SLukas Czerner /* 2971bfff6873SLukas Czerner * It looks like the request list is empty, but we need 2972bfff6873SLukas Czerner * to check it under the li_list_mtx lock, to prevent any 2973bfff6873SLukas Czerner * additions into it, and of course we should lock ext4_li_mtx 2974bfff6873SLukas Czerner * to atomically free the list and ext4_li_info, because at 2975bfff6873SLukas Czerner * this point another ext4 filesystem could be registering 2976bfff6873SLukas Czerner * new one. 2977bfff6873SLukas Czerner */ 2978bfff6873SLukas Czerner mutex_lock(&ext4_li_mtx); 2979bfff6873SLukas Czerner mutex_lock(&eli->li_list_mtx); 2980bfff6873SLukas Czerner if (!list_empty(&eli->li_request_list)) { 2981bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2982bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2983bfff6873SLukas Czerner goto cont_thread; 2984bfff6873SLukas Czerner } 2985bfff6873SLukas Czerner mutex_unlock(&eli->li_list_mtx); 2986bfff6873SLukas Czerner kfree(ext4_li_info); 2987bfff6873SLukas Czerner ext4_li_info = NULL; 2988bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 2989bfff6873SLukas Czerner 2990bfff6873SLukas Czerner return 0; 2991bfff6873SLukas Czerner } 2992bfff6873SLukas Czerner 2993bfff6873SLukas Czerner static void ext4_clear_request_list(void) 2994bfff6873SLukas Czerner { 2995bfff6873SLukas Czerner struct list_head *pos, *n; 2996bfff6873SLukas Czerner struct ext4_li_request *elr; 2997bfff6873SLukas Czerner 2998bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 2999bfff6873SLukas Czerner list_for_each_safe(pos, n, &ext4_li_info->li_request_list) { 3000bfff6873SLukas Czerner elr = list_entry(pos, struct ext4_li_request, 3001bfff6873SLukas Czerner lr_request); 3002bfff6873SLukas Czerner ext4_remove_li_request(elr); 3003bfff6873SLukas Czerner } 3004bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3005bfff6873SLukas Czerner } 3006bfff6873SLukas Czerner 3007bfff6873SLukas Czerner static int ext4_run_lazyinit_thread(void) 3008bfff6873SLukas Czerner { 30098f1f7453SEric Sandeen ext4_lazyinit_task = kthread_run(ext4_lazyinit_thread, 30108f1f7453SEric Sandeen ext4_li_info, "ext4lazyinit"); 30118f1f7453SEric Sandeen if (IS_ERR(ext4_lazyinit_task)) { 30128f1f7453SEric Sandeen int err = PTR_ERR(ext4_lazyinit_task); 3013bfff6873SLukas Czerner ext4_clear_request_list(); 3014bfff6873SLukas Czerner kfree(ext4_li_info); 3015bfff6873SLukas Czerner ext4_li_info = NULL; 301692b97816STheodore Ts'o printk(KERN_CRIT "EXT4-fs: error %d creating inode table " 3017bfff6873SLukas Czerner "initialization thread\n", 3018bfff6873SLukas Czerner err); 3019bfff6873SLukas Czerner return err; 3020bfff6873SLukas Czerner } 3021bfff6873SLukas Czerner ext4_li_info->li_state |= EXT4_LAZYINIT_RUNNING; 3022bfff6873SLukas Czerner return 0; 3023bfff6873SLukas Czerner } 3024bfff6873SLukas Czerner 3025bfff6873SLukas Czerner /* 3026bfff6873SLukas Czerner * Check whether it make sense to run itable init. thread or not. 3027bfff6873SLukas Czerner * If there is at least one uninitialized inode table, return 3028bfff6873SLukas Czerner * corresponding group number, else the loop goes through all 3029bfff6873SLukas Czerner * groups and return total number of groups. 3030bfff6873SLukas Czerner */ 3031bfff6873SLukas Czerner static ext4_group_t ext4_has_uninit_itable(struct super_block *sb) 3032bfff6873SLukas Czerner { 3033bfff6873SLukas Czerner ext4_group_t group, ngroups = EXT4_SB(sb)->s_groups_count; 3034bfff6873SLukas Czerner struct ext4_group_desc *gdp = NULL; 3035bfff6873SLukas Czerner 3036bfff6873SLukas Czerner for (group = 0; group < ngroups; group++) { 3037bfff6873SLukas Czerner gdp = ext4_get_group_desc(sb, group, NULL); 3038bfff6873SLukas Czerner if (!gdp) 3039bfff6873SLukas Czerner continue; 3040bfff6873SLukas Czerner 3041bfff6873SLukas Czerner if (!(gdp->bg_flags & cpu_to_le16(EXT4_BG_INODE_ZEROED))) 3042bfff6873SLukas Czerner break; 3043bfff6873SLukas Czerner } 3044bfff6873SLukas Czerner 3045bfff6873SLukas Czerner return group; 3046bfff6873SLukas Czerner } 3047bfff6873SLukas Czerner 3048bfff6873SLukas Czerner static int ext4_li_info_new(void) 3049bfff6873SLukas Czerner { 3050bfff6873SLukas Czerner struct ext4_lazy_init *eli = NULL; 3051bfff6873SLukas Czerner 3052bfff6873SLukas Czerner eli = kzalloc(sizeof(*eli), GFP_KERNEL); 3053bfff6873SLukas Czerner if (!eli) 3054bfff6873SLukas Czerner return -ENOMEM; 3055bfff6873SLukas Czerner 3056bfff6873SLukas Czerner INIT_LIST_HEAD(&eli->li_request_list); 3057bfff6873SLukas Czerner mutex_init(&eli->li_list_mtx); 3058bfff6873SLukas Czerner 3059bfff6873SLukas Czerner eli->li_state |= EXT4_LAZYINIT_QUIT; 3060bfff6873SLukas Czerner 3061bfff6873SLukas Czerner ext4_li_info = eli; 3062bfff6873SLukas Czerner 3063bfff6873SLukas Czerner return 0; 3064bfff6873SLukas Czerner } 3065bfff6873SLukas Czerner 3066bfff6873SLukas Czerner static struct ext4_li_request *ext4_li_request_new(struct super_block *sb, 3067bfff6873SLukas Czerner ext4_group_t start) 3068bfff6873SLukas Czerner { 3069bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 3070bfff6873SLukas Czerner struct ext4_li_request *elr; 3071bfff6873SLukas Czerner 3072bfff6873SLukas Czerner elr = kzalloc(sizeof(*elr), GFP_KERNEL); 3073bfff6873SLukas Czerner if (!elr) 3074bfff6873SLukas Czerner return NULL; 3075bfff6873SLukas Czerner 3076bfff6873SLukas Czerner elr->lr_super = sb; 3077bfff6873SLukas Czerner elr->lr_sbi = sbi; 3078bfff6873SLukas Czerner elr->lr_next_group = start; 3079bfff6873SLukas Czerner 3080bfff6873SLukas Czerner /* 3081bfff6873SLukas Czerner * Randomize first schedule time of the request to 3082bfff6873SLukas Czerner * spread the inode table initialization requests 3083bfff6873SLukas Czerner * better. 3084bfff6873SLukas Czerner */ 3085dd1f723bSTheodore Ts'o elr->lr_next_sched = jiffies + (prandom_u32() % 3086dd1f723bSTheodore Ts'o (EXT4_DEF_LI_MAX_START_DELAY * HZ)); 3087bfff6873SLukas Czerner return elr; 3088bfff6873SLukas Czerner } 3089bfff6873SLukas Czerner 30907f511862STheodore Ts'o int ext4_register_li_request(struct super_block *sb, 3091bfff6873SLukas Czerner ext4_group_t first_not_zeroed) 3092bfff6873SLukas Czerner { 3093bfff6873SLukas Czerner struct ext4_sb_info *sbi = EXT4_SB(sb); 30947f511862STheodore Ts'o struct ext4_li_request *elr = NULL; 3095bfff6873SLukas Czerner ext4_group_t ngroups = EXT4_SB(sb)->s_groups_count; 30966c5a6cb9SAndrew Morton int ret = 0; 3097bfff6873SLukas Czerner 30987f511862STheodore Ts'o mutex_lock(&ext4_li_mtx); 309951ce6511SLukas Czerner if (sbi->s_li_request != NULL) { 310051ce6511SLukas Czerner /* 310151ce6511SLukas Czerner * Reset timeout so it can be computed again, because 310251ce6511SLukas Czerner * s_li_wait_mult might have changed. 310351ce6511SLukas Czerner */ 310451ce6511SLukas Czerner sbi->s_li_request->lr_timeout = 0; 31057f511862STheodore Ts'o goto out; 310651ce6511SLukas Czerner } 3107bfff6873SLukas Czerner 3108bfff6873SLukas Czerner if (first_not_zeroed == ngroups || 3109bfff6873SLukas Czerner (sb->s_flags & MS_RDONLY) || 311055ff3840STao Ma !test_opt(sb, INIT_INODE_TABLE)) 31117f511862STheodore Ts'o goto out; 3112bfff6873SLukas Czerner 3113bfff6873SLukas Czerner elr = ext4_li_request_new(sb, first_not_zeroed); 31147f511862STheodore Ts'o if (!elr) { 31157f511862STheodore Ts'o ret = -ENOMEM; 31167f511862STheodore Ts'o goto out; 31177f511862STheodore Ts'o } 3118bfff6873SLukas Czerner 3119bfff6873SLukas Czerner if (NULL == ext4_li_info) { 3120bfff6873SLukas Czerner ret = ext4_li_info_new(); 3121bfff6873SLukas Czerner if (ret) 3122bfff6873SLukas Czerner goto out; 3123bfff6873SLukas Czerner } 3124bfff6873SLukas Czerner 3125bfff6873SLukas Czerner mutex_lock(&ext4_li_info->li_list_mtx); 3126bfff6873SLukas Czerner list_add(&elr->lr_request, &ext4_li_info->li_request_list); 3127bfff6873SLukas Czerner mutex_unlock(&ext4_li_info->li_list_mtx); 3128bfff6873SLukas Czerner 3129bfff6873SLukas Czerner sbi->s_li_request = elr; 313046e4690bSTao Ma /* 313146e4690bSTao Ma * set elr to NULL here since it has been inserted to 313246e4690bSTao Ma * the request_list and the removal and free of it is 313346e4690bSTao Ma * handled by ext4_clear_request_list from now on. 313446e4690bSTao Ma */ 313546e4690bSTao Ma elr = NULL; 3136bfff6873SLukas Czerner 3137bfff6873SLukas Czerner if (!(ext4_li_info->li_state & EXT4_LAZYINIT_RUNNING)) { 3138bfff6873SLukas Czerner ret = ext4_run_lazyinit_thread(); 3139bfff6873SLukas Czerner if (ret) 3140bfff6873SLukas Czerner goto out; 3141bfff6873SLukas Czerner } 3142bfff6873SLukas Czerner out: 3143bfff6873SLukas Czerner mutex_unlock(&ext4_li_mtx); 3144beed5ecbSNicolas Kaiser if (ret) 3145bfff6873SLukas Czerner kfree(elr); 3146bfff6873SLukas Czerner return ret; 3147bfff6873SLukas Czerner } 3148bfff6873SLukas Czerner 3149bfff6873SLukas Czerner /* 3150bfff6873SLukas Czerner * We do not need to lock anything since this is called on 3151bfff6873SLukas Czerner * module unload. 3152bfff6873SLukas Czerner */ 3153bfff6873SLukas Czerner static void ext4_destroy_lazyinit_thread(void) 3154bfff6873SLukas Czerner { 3155bfff6873SLukas Czerner /* 3156bfff6873SLukas Czerner * If thread exited earlier 3157bfff6873SLukas Czerner * there's nothing to be done. 3158bfff6873SLukas Czerner */ 31598f1f7453SEric Sandeen if (!ext4_li_info || !ext4_lazyinit_task) 3160bfff6873SLukas Czerner return; 3161bfff6873SLukas Czerner 31628f1f7453SEric Sandeen kthread_stop(ext4_lazyinit_task); 3163bfff6873SLukas Czerner } 3164bfff6873SLukas Czerner 316525ed6e8aSDarrick J. Wong static int set_journal_csum_feature_set(struct super_block *sb) 316625ed6e8aSDarrick J. Wong { 316725ed6e8aSDarrick J. Wong int ret = 1; 316825ed6e8aSDarrick J. Wong int compat, incompat; 316925ed6e8aSDarrick J. Wong struct ext4_sb_info *sbi = EXT4_SB(sb); 317025ed6e8aSDarrick J. Wong 317125ed6e8aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 317225ed6e8aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 317325ed6e8aSDarrick J. Wong /* journal checksum v2 */ 317425ed6e8aSDarrick J. Wong compat = 0; 317525ed6e8aSDarrick J. Wong incompat = JBD2_FEATURE_INCOMPAT_CSUM_V2; 317625ed6e8aSDarrick J. Wong } else { 317725ed6e8aSDarrick J. Wong /* journal checksum v1 */ 317825ed6e8aSDarrick J. Wong compat = JBD2_FEATURE_COMPAT_CHECKSUM; 317925ed6e8aSDarrick J. Wong incompat = 0; 318025ed6e8aSDarrick J. Wong } 318125ed6e8aSDarrick J. Wong 318225ed6e8aSDarrick J. Wong if (test_opt(sb, JOURNAL_ASYNC_COMMIT)) { 318325ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 318425ed6e8aSDarrick J. Wong compat, 0, 318525ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 318625ed6e8aSDarrick J. Wong incompat); 318725ed6e8aSDarrick J. Wong } else if (test_opt(sb, JOURNAL_CHECKSUM)) { 318825ed6e8aSDarrick J. Wong ret = jbd2_journal_set_features(sbi->s_journal, 318925ed6e8aSDarrick J. Wong compat, 0, 319025ed6e8aSDarrick J. Wong incompat); 319125ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 0, 0, 319225ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT); 319325ed6e8aSDarrick J. Wong } else { 319425ed6e8aSDarrick J. Wong jbd2_journal_clear_features(sbi->s_journal, 319525ed6e8aSDarrick J. Wong JBD2_FEATURE_COMPAT_CHECKSUM, 0, 319625ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_ASYNC_COMMIT | 319725ed6e8aSDarrick J. Wong JBD2_FEATURE_INCOMPAT_CSUM_V2); 319825ed6e8aSDarrick J. Wong } 319925ed6e8aSDarrick J. Wong 320025ed6e8aSDarrick J. Wong return ret; 320125ed6e8aSDarrick J. Wong } 320225ed6e8aSDarrick J. Wong 3203952fc18eSTheodore Ts'o /* 3204952fc18eSTheodore Ts'o * Note: calculating the overhead so we can be compatible with 3205952fc18eSTheodore Ts'o * historical BSD practice is quite difficult in the face of 3206952fc18eSTheodore Ts'o * clusters/bigalloc. This is because multiple metadata blocks from 3207952fc18eSTheodore Ts'o * different block group can end up in the same allocation cluster. 3208952fc18eSTheodore Ts'o * Calculating the exact overhead in the face of clustered allocation 3209952fc18eSTheodore Ts'o * requires either O(all block bitmaps) in memory or O(number of block 3210952fc18eSTheodore Ts'o * groups**2) in time. We will still calculate the superblock for 3211952fc18eSTheodore Ts'o * older file systems --- and if we come across with a bigalloc file 3212952fc18eSTheodore Ts'o * system with zero in s_overhead_clusters the estimate will be close to 3213952fc18eSTheodore Ts'o * correct especially for very large cluster sizes --- but for newer 3214952fc18eSTheodore Ts'o * file systems, it's better to calculate this figure once at mkfs 3215952fc18eSTheodore Ts'o * time, and store it in the superblock. If the superblock value is 3216952fc18eSTheodore Ts'o * present (even for non-bigalloc file systems), we will use it. 3217952fc18eSTheodore Ts'o */ 3218952fc18eSTheodore Ts'o static int count_overhead(struct super_block *sb, ext4_group_t grp, 3219952fc18eSTheodore Ts'o char *buf) 3220952fc18eSTheodore Ts'o { 3221952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3222952fc18eSTheodore Ts'o struct ext4_group_desc *gdp; 3223952fc18eSTheodore Ts'o ext4_fsblk_t first_block, last_block, b; 3224952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3225952fc18eSTheodore Ts'o int s, j, count = 0; 3226952fc18eSTheodore Ts'o 32270548bbb8STheodore Ts'o if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_BIGALLOC)) 32280548bbb8STheodore Ts'o return (ext4_bg_has_super(sb, grp) + ext4_bg_num_gdb(sb, grp) + 32290548bbb8STheodore Ts'o sbi->s_itb_per_group + 2); 32300548bbb8STheodore Ts'o 3231952fc18eSTheodore Ts'o first_block = le32_to_cpu(sbi->s_es->s_first_data_block) + 3232952fc18eSTheodore Ts'o (grp * EXT4_BLOCKS_PER_GROUP(sb)); 3233952fc18eSTheodore Ts'o last_block = first_block + EXT4_BLOCKS_PER_GROUP(sb) - 1; 3234952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3235952fc18eSTheodore Ts'o gdp = ext4_get_group_desc(sb, i, NULL); 3236952fc18eSTheodore Ts'o b = ext4_block_bitmap(sb, gdp); 3237952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3238952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3239952fc18eSTheodore Ts'o count++; 3240952fc18eSTheodore Ts'o } 3241952fc18eSTheodore Ts'o b = ext4_inode_bitmap(sb, gdp); 3242952fc18eSTheodore Ts'o if (b >= first_block && b <= last_block) { 3243952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, b - first_block), buf); 3244952fc18eSTheodore Ts'o count++; 3245952fc18eSTheodore Ts'o } 3246952fc18eSTheodore Ts'o b = ext4_inode_table(sb, gdp); 3247952fc18eSTheodore Ts'o if (b >= first_block && b + sbi->s_itb_per_group <= last_block) 3248952fc18eSTheodore Ts'o for (j = 0; j < sbi->s_itb_per_group; j++, b++) { 3249952fc18eSTheodore Ts'o int c = EXT4_B2C(sbi, b - first_block); 3250952fc18eSTheodore Ts'o ext4_set_bit(c, buf); 3251952fc18eSTheodore Ts'o count++; 3252952fc18eSTheodore Ts'o } 3253952fc18eSTheodore Ts'o if (i != grp) 3254952fc18eSTheodore Ts'o continue; 3255952fc18eSTheodore Ts'o s = 0; 3256952fc18eSTheodore Ts'o if (ext4_bg_has_super(sb, grp)) { 3257952fc18eSTheodore Ts'o ext4_set_bit(s++, buf); 3258952fc18eSTheodore Ts'o count++; 3259952fc18eSTheodore Ts'o } 3260952fc18eSTheodore Ts'o for (j = ext4_bg_num_gdb(sb, grp); j > 0; j--) { 3261952fc18eSTheodore Ts'o ext4_set_bit(EXT4_B2C(sbi, s++), buf); 3262952fc18eSTheodore Ts'o count++; 3263952fc18eSTheodore Ts'o } 3264952fc18eSTheodore Ts'o } 3265952fc18eSTheodore Ts'o if (!count) 3266952fc18eSTheodore Ts'o return 0; 3267952fc18eSTheodore Ts'o return EXT4_CLUSTERS_PER_GROUP(sb) - 3268952fc18eSTheodore Ts'o ext4_count_free(buf, EXT4_CLUSTERS_PER_GROUP(sb) / 8); 3269952fc18eSTheodore Ts'o } 3270952fc18eSTheodore Ts'o 3271952fc18eSTheodore Ts'o /* 3272952fc18eSTheodore Ts'o * Compute the overhead and stash it in sbi->s_overhead 3273952fc18eSTheodore Ts'o */ 3274952fc18eSTheodore Ts'o int ext4_calculate_overhead(struct super_block *sb) 3275952fc18eSTheodore Ts'o { 3276952fc18eSTheodore Ts'o struct ext4_sb_info *sbi = EXT4_SB(sb); 3277952fc18eSTheodore Ts'o struct ext4_super_block *es = sbi->s_es; 3278952fc18eSTheodore Ts'o ext4_group_t i, ngroups = ext4_get_groups_count(sb); 3279952fc18eSTheodore Ts'o ext4_fsblk_t overhead = 0; 3280952fc18eSTheodore Ts'o char *buf = (char *) get_zeroed_page(GFP_KERNEL); 3281952fc18eSTheodore Ts'o 3282952fc18eSTheodore Ts'o if (!buf) 3283952fc18eSTheodore Ts'o return -ENOMEM; 3284952fc18eSTheodore Ts'o 3285952fc18eSTheodore Ts'o /* 3286952fc18eSTheodore Ts'o * Compute the overhead (FS structures). This is constant 3287952fc18eSTheodore Ts'o * for a given filesystem unless the number of block groups 3288952fc18eSTheodore Ts'o * changes so we cache the previous value until it does. 3289952fc18eSTheodore Ts'o */ 3290952fc18eSTheodore Ts'o 3291952fc18eSTheodore Ts'o /* 3292952fc18eSTheodore Ts'o * All of the blocks before first_data_block are overhead 3293952fc18eSTheodore Ts'o */ 3294952fc18eSTheodore Ts'o overhead = EXT4_B2C(sbi, le32_to_cpu(es->s_first_data_block)); 3295952fc18eSTheodore Ts'o 3296952fc18eSTheodore Ts'o /* 3297952fc18eSTheodore Ts'o * Add the overhead found in each block group 3298952fc18eSTheodore Ts'o */ 3299952fc18eSTheodore Ts'o for (i = 0; i < ngroups; i++) { 3300952fc18eSTheodore Ts'o int blks; 3301952fc18eSTheodore Ts'o 3302952fc18eSTheodore Ts'o blks = count_overhead(sb, i, buf); 3303952fc18eSTheodore Ts'o overhead += blks; 3304952fc18eSTheodore Ts'o if (blks) 3305952fc18eSTheodore Ts'o memset(buf, 0, PAGE_SIZE); 3306952fc18eSTheodore Ts'o cond_resched(); 3307952fc18eSTheodore Ts'o } 33080875a2b4SEric Sandeen /* Add the journal blocks as well */ 33090875a2b4SEric Sandeen if (sbi->s_journal) 3310810da240SLukas Czerner overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen); 33110875a2b4SEric Sandeen 3312952fc18eSTheodore Ts'o sbi->s_overhead = overhead; 3313952fc18eSTheodore Ts'o smp_wmb(); 3314952fc18eSTheodore Ts'o free_page((unsigned long) buf); 3315952fc18eSTheodore Ts'o return 0; 3316952fc18eSTheodore Ts'o } 3317952fc18eSTheodore Ts'o 331827dd4385SLukas Czerner 3319*30fac0f7SJan Kara static ext4_fsblk_t ext4_calculate_resv_clusters(struct super_block *sb) 332027dd4385SLukas Czerner { 332127dd4385SLukas Czerner ext4_fsblk_t resv_clusters; 332227dd4385SLukas Czerner 332327dd4385SLukas Czerner /* 3324*30fac0f7SJan Kara * There's no need to reserve anything when we aren't using extents. 3325*30fac0f7SJan Kara * The space estimates are exact, there are no unwritten extents, 3326*30fac0f7SJan Kara * hole punching doesn't need new metadata... This is needed especially 3327*30fac0f7SJan Kara * to keep ext2/3 backward compatibility. 3328*30fac0f7SJan Kara */ 3329*30fac0f7SJan Kara if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) 3330*30fac0f7SJan Kara return 0; 3331*30fac0f7SJan Kara /* 333227dd4385SLukas Czerner * By default we reserve 2% or 4096 clusters, whichever is smaller. 333327dd4385SLukas Czerner * This should cover the situations where we can not afford to run 333427dd4385SLukas Czerner * out of space like for example punch hole, or converting 333527dd4385SLukas Czerner * uninitialized extents in delalloc path. In most cases such 333627dd4385SLukas Czerner * allocation would require 1, or 2 blocks, higher numbers are 333727dd4385SLukas Czerner * very rare. 333827dd4385SLukas Czerner */ 3339*30fac0f7SJan Kara resv_clusters = ext4_blocks_count(EXT4_SB(sb)->s_es) >> 3340*30fac0f7SJan Kara EXT4_SB(sb)->s_cluster_bits; 334127dd4385SLukas Czerner 334227dd4385SLukas Czerner do_div(resv_clusters, 50); 334327dd4385SLukas Czerner resv_clusters = min_t(ext4_fsblk_t, resv_clusters, 4096); 334427dd4385SLukas Czerner 334527dd4385SLukas Czerner return resv_clusters; 334627dd4385SLukas Czerner } 334727dd4385SLukas Czerner 334827dd4385SLukas Czerner 334927dd4385SLukas Czerner static int ext4_reserve_clusters(struct ext4_sb_info *sbi, ext4_fsblk_t count) 335027dd4385SLukas Czerner { 335127dd4385SLukas Czerner ext4_fsblk_t clusters = ext4_blocks_count(sbi->s_es) >> 335227dd4385SLukas Czerner sbi->s_cluster_bits; 335327dd4385SLukas Czerner 335427dd4385SLukas Czerner if (count >= clusters) 335527dd4385SLukas Czerner return -EINVAL; 335627dd4385SLukas Czerner 335727dd4385SLukas Czerner atomic64_set(&sbi->s_resv_clusters, count); 335827dd4385SLukas Czerner return 0; 335927dd4385SLukas Czerner } 336027dd4385SLukas Czerner 3361617ba13bSMingming Cao static int ext4_fill_super(struct super_block *sb, void *data, int silent) 3362ac27a0ecSDave Kleikamp { 3363d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 3364ac27a0ecSDave Kleikamp struct buffer_head *bh; 3365617ba13bSMingming Cao struct ext4_super_block *es = NULL; 3366617ba13bSMingming Cao struct ext4_sb_info *sbi; 3367617ba13bSMingming Cao ext4_fsblk_t block; 3368617ba13bSMingming Cao ext4_fsblk_t sb_block = get_sb_block(&data); 336970bbb3e0SAndrew Morton ext4_fsblk_t logical_sb_block; 3370ac27a0ecSDave Kleikamp unsigned long offset = 0; 3371ac27a0ecSDave Kleikamp unsigned long journal_devnum = 0; 3372ac27a0ecSDave Kleikamp unsigned long def_mount_opts; 3373ac27a0ecSDave Kleikamp struct inode *root; 33749f6200bbSTheodore Ts'o char *cp; 33750390131bSFrank Mayhar const char *descr; 3376dcc7dae3SCyrill Gorcunov int ret = -ENOMEM; 3377281b5995STheodore Ts'o int blocksize, clustersize; 33784ec11028STheodore Ts'o unsigned int db_count; 33794ec11028STheodore Ts'o unsigned int i; 3380281b5995STheodore Ts'o int needs_recovery, has_huge_files, has_bigalloc; 3381bd81d8eeSLaurent Vivier __u64 blocks_count; 338207aa2ea1SLukas Czerner int err = 0; 3383b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 3384bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 3385ac27a0ecSDave Kleikamp 3386ac27a0ecSDave Kleikamp sbi = kzalloc(sizeof(*sbi), GFP_KERNEL); 3387ac27a0ecSDave Kleikamp if (!sbi) 3388dcc7dae3SCyrill Gorcunov goto out_free_orig; 3389705895b6SPekka Enberg 3390705895b6SPekka Enberg sbi->s_blockgroup_lock = 3391705895b6SPekka Enberg kzalloc(sizeof(struct blockgroup_lock), GFP_KERNEL); 3392705895b6SPekka Enberg if (!sbi->s_blockgroup_lock) { 3393705895b6SPekka Enberg kfree(sbi); 3394dcc7dae3SCyrill Gorcunov goto out_free_orig; 3395705895b6SPekka Enberg } 3396ac27a0ecSDave Kleikamp sb->s_fs_info = sbi; 33972c0544b2STheodore Ts'o sbi->s_sb = sb; 3398240799cdSTheodore Ts'o sbi->s_inode_readahead_blks = EXT4_DEF_INODE_READAHEAD_BLKS; 3399d9c9bef1SMiklos Szeredi sbi->s_sb_block = sb_block; 3400f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 3401f613dfcbSTheodore Ts'o sbi->s_sectors_written_start = 3402f613dfcbSTheodore Ts'o part_stat_read(sb->s_bdev->bd_part, sectors[1]); 3403ac27a0ecSDave Kleikamp 34049f6200bbSTheodore Ts'o /* Cleanup superblock name */ 34059f6200bbSTheodore Ts'o for (cp = sb->s_id; (cp = strchr(cp, '/'));) 34069f6200bbSTheodore Ts'o *cp = '!'; 34079f6200bbSTheodore Ts'o 340807aa2ea1SLukas Czerner /* -EINVAL is default */ 3409dcc7dae3SCyrill Gorcunov ret = -EINVAL; 3410617ba13bSMingming Cao blocksize = sb_min_blocksize(sb, EXT4_MIN_BLOCK_SIZE); 3411ac27a0ecSDave Kleikamp if (!blocksize) { 3412b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to set blocksize"); 3413ac27a0ecSDave Kleikamp goto out_fail; 3414ac27a0ecSDave Kleikamp } 3415ac27a0ecSDave Kleikamp 3416ac27a0ecSDave Kleikamp /* 3417617ba13bSMingming Cao * The ext4 superblock will not be buffer aligned for other than 1kB 3418ac27a0ecSDave Kleikamp * block sizes. We need to calculate the offset from buffer start. 3419ac27a0ecSDave Kleikamp */ 3420617ba13bSMingming Cao if (blocksize != EXT4_MIN_BLOCK_SIZE) { 342170bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 342270bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 3423ac27a0ecSDave Kleikamp } else { 342470bbb3e0SAndrew Morton logical_sb_block = sb_block; 3425ac27a0ecSDave Kleikamp } 3426ac27a0ecSDave Kleikamp 342770bbb3e0SAndrew Morton if (!(bh = sb_bread(sb, logical_sb_block))) { 3428b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "unable to read superblock"); 3429ac27a0ecSDave Kleikamp goto out_fail; 3430ac27a0ecSDave Kleikamp } 3431ac27a0ecSDave Kleikamp /* 3432ac27a0ecSDave Kleikamp * Note: s_es must be initialized as soon as possible because 3433617ba13bSMingming Cao * some ext4 macro-instructions depend on its value 3434ac27a0ecSDave Kleikamp */ 34352716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 3436ac27a0ecSDave Kleikamp sbi->s_es = es; 3437ac27a0ecSDave Kleikamp sb->s_magic = le16_to_cpu(es->s_magic); 3438617ba13bSMingming Cao if (sb->s_magic != EXT4_SUPER_MAGIC) 3439617ba13bSMingming Cao goto cantfind_ext4; 3440afc32f7eSTheodore Ts'o sbi->s_kbytes_written = le64_to_cpu(es->s_kbytes_written); 3441ac27a0ecSDave Kleikamp 3442feb0ab32SDarrick J. Wong /* Warn if metadata_csum and gdt_csum are both set. */ 3443feb0ab32SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3444feb0ab32SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM) && 3445feb0ab32SDarrick J. Wong EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_GDT_CSUM)) 3446feb0ab32SDarrick J. Wong ext4_warning(sb, KERN_INFO "metadata_csum and uninit_bg are " 3447feb0ab32SDarrick J. Wong "redundant flags; please run fsck."); 3448feb0ab32SDarrick J. Wong 3449d25425f8SDarrick J. Wong /* Check for a known checksum algorithm */ 3450d25425f8SDarrick J. Wong if (!ext4_verify_csum_type(sb, es)) { 3451d25425f8SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3452d25425f8SDarrick J. Wong "unknown checksum algorithm."); 3453d25425f8SDarrick J. Wong silent = 1; 3454d25425f8SDarrick J. Wong goto cantfind_ext4; 3455d25425f8SDarrick J. Wong } 3456d25425f8SDarrick J. Wong 34570441984aSDarrick J. Wong /* Load the checksum driver */ 34580441984aSDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 34590441984aSDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) { 34600441984aSDarrick J. Wong sbi->s_chksum_driver = crypto_alloc_shash("crc32c", 0, 0); 34610441984aSDarrick J. Wong if (IS_ERR(sbi->s_chksum_driver)) { 34620441984aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Cannot load crc32c driver."); 34630441984aSDarrick J. Wong ret = PTR_ERR(sbi->s_chksum_driver); 34640441984aSDarrick J. Wong sbi->s_chksum_driver = NULL; 34650441984aSDarrick J. Wong goto failed_mount; 34660441984aSDarrick J. Wong } 34670441984aSDarrick J. Wong } 34680441984aSDarrick J. Wong 3469a9c47317SDarrick J. Wong /* Check superblock checksum */ 3470a9c47317SDarrick J. Wong if (!ext4_superblock_csum_verify(sb, es)) { 3471a9c47317SDarrick J. Wong ext4_msg(sb, KERN_ERR, "VFS: Found ext4 filesystem with " 3472a9c47317SDarrick J. Wong "invalid superblock checksum. Run e2fsck?"); 3473a9c47317SDarrick J. Wong silent = 1; 3474a9c47317SDarrick J. Wong goto cantfind_ext4; 3475a9c47317SDarrick J. Wong } 3476a9c47317SDarrick J. Wong 3477a9c47317SDarrick J. Wong /* Precompute checksum seed for all metadata */ 3478a9c47317SDarrick J. Wong if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 3479a9c47317SDarrick J. Wong EXT4_FEATURE_RO_COMPAT_METADATA_CSUM)) 3480a9c47317SDarrick J. Wong sbi->s_csum_seed = ext4_chksum(sbi, ~0, es->s_uuid, 3481a9c47317SDarrick J. Wong sizeof(es->s_uuid)); 3482a9c47317SDarrick J. Wong 3483ac27a0ecSDave Kleikamp /* Set defaults before we parse the mount options */ 3484ac27a0ecSDave Kleikamp def_mount_opts = le32_to_cpu(es->s_default_mount_opts); 3485fd8c37ecSTheodore Ts'o set_opt(sb, INIT_INODE_TABLE); 3486617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_DEBUG) 3487fd8c37ecSTheodore Ts'o set_opt(sb, DEBUG); 348887f26807STheodore Ts'o if (def_mount_opts & EXT4_DEFM_BSDGROUPS) 3489fd8c37ecSTheodore Ts'o set_opt(sb, GRPID); 3490617ba13bSMingming Cao if (def_mount_opts & EXT4_DEFM_UID16) 3491fd8c37ecSTheodore Ts'o set_opt(sb, NO_UID32); 3492ea663336SEric Sandeen /* xattr user namespace & acls are now defaulted on */ 3493fd8c37ecSTheodore Ts'o set_opt(sb, XATTR_USER); 349403010a33STheodore Ts'o #ifdef CONFIG_EXT4_FS_POSIX_ACL 3495fd8c37ecSTheodore Ts'o set_opt(sb, POSIX_ACL); 34962e7842b8SHugh Dickins #endif 3497617ba13bSMingming Cao if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_DATA) 3498fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3499617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_ORDERED) 3500fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3501617ba13bSMingming Cao else if ((def_mount_opts & EXT4_DEFM_JMODE) == EXT4_DEFM_JMODE_WBACK) 3502fd8c37ecSTheodore Ts'o set_opt(sb, WRITEBACK_DATA); 3503ac27a0ecSDave Kleikamp 3504617ba13bSMingming Cao if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_PANIC) 3505fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_PANIC); 3506bb4f397aSAneesh Kumar K.V else if (le16_to_cpu(sbi->s_es->s_errors) == EXT4_ERRORS_CONTINUE) 3507fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_CONT); 3508bb4f397aSAneesh Kumar K.V else 3509fd8c37ecSTheodore Ts'o set_opt(sb, ERRORS_RO); 35108b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_BLOCK_VALIDITY) 3511fd8c37ecSTheodore Ts'o set_opt(sb, BLOCK_VALIDITY); 35128b67f04aSTheodore Ts'o if (def_mount_opts & EXT4_DEFM_DISCARD) 3513fd8c37ecSTheodore Ts'o set_opt(sb, DISCARD); 3514ac27a0ecSDave Kleikamp 351508cefc7aSEric W. Biederman sbi->s_resuid = make_kuid(&init_user_ns, le16_to_cpu(es->s_def_resuid)); 351608cefc7aSEric W. Biederman sbi->s_resgid = make_kgid(&init_user_ns, le16_to_cpu(es->s_def_resgid)); 351730773840STheodore Ts'o sbi->s_commit_interval = JBD2_DEFAULT_MAX_COMMIT_AGE * HZ; 351830773840STheodore Ts'o sbi->s_min_batch_time = EXT4_DEF_MIN_BATCH_TIME; 351930773840STheodore Ts'o sbi->s_max_batch_time = EXT4_DEF_MAX_BATCH_TIME; 3520ac27a0ecSDave Kleikamp 35218b67f04aSTheodore Ts'o if ((def_mount_opts & EXT4_DEFM_NOBARRIER) == 0) 3522fd8c37ecSTheodore Ts'o set_opt(sb, BARRIER); 3523ac27a0ecSDave Kleikamp 35241e2462f9SMingming Cao /* 3525dd919b98SAneesh Kumar K.V * enable delayed allocation by default 3526dd919b98SAneesh Kumar K.V * Use -o nodelalloc to turn it off 3527dd919b98SAneesh Kumar K.V */ 3528bc0b75f7STheodore Ts'o if (!IS_EXT3_SB(sb) && !IS_EXT2_SB(sb) && 35298b67f04aSTheodore Ts'o ((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0)) 3530fd8c37ecSTheodore Ts'o set_opt(sb, DELALLOC); 3531dd919b98SAneesh Kumar K.V 353251ce6511SLukas Czerner /* 353351ce6511SLukas Czerner * set default s_li_wait_mult for lazyinit, for the case there is 353451ce6511SLukas Czerner * no mount option specified. 353551ce6511SLukas Czerner */ 353651ce6511SLukas Czerner sbi->s_li_wait_mult = EXT4_DEF_LI_WAIT_MULT; 353751ce6511SLukas Czerner 35388b67f04aSTheodore Ts'o if (!parse_options((char *) sbi->s_es->s_mount_opts, sb, 3539661aa520SEric Sandeen &journal_devnum, &journal_ioprio, 0)) { 35408b67f04aSTheodore Ts'o ext4_msg(sb, KERN_WARNING, 35418b67f04aSTheodore Ts'o "failed to parse options in superblock: %s", 35428b67f04aSTheodore Ts'o sbi->s_es->s_mount_opts); 35438b67f04aSTheodore Ts'o } 35445a916be1STheodore Ts'o sbi->s_def_mount_opt = sbi->s_mount_opt; 3545b3881f74STheodore Ts'o if (!parse_options((char *) data, sb, &journal_devnum, 3546661aa520SEric Sandeen &journal_ioprio, 0)) 3547ac27a0ecSDave Kleikamp goto failed_mount; 3548ac27a0ecSDave Kleikamp 354956889787STheodore Ts'o if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 355056889787STheodore Ts'o printk_once(KERN_WARNING "EXT4-fs: Warning: mounting " 355156889787STheodore Ts'o "with data=journal disables delayed " 355256889787STheodore Ts'o "allocation and O_DIRECT support!\n"); 355356889787STheodore Ts'o if (test_opt2(sb, EXPLICIT_DELALLOC)) { 355456889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 355556889787STheodore Ts'o "both data=journal and delalloc"); 355656889787STheodore Ts'o goto failed_mount; 355756889787STheodore Ts'o } 355856889787STheodore Ts'o if (test_opt(sb, DIOREAD_NOLOCK)) { 355956889787STheodore Ts'o ext4_msg(sb, KERN_ERR, "can't mount with " 35606ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 356156889787STheodore Ts'o goto failed_mount; 356256889787STheodore Ts'o } 356356889787STheodore Ts'o if (test_opt(sb, DELALLOC)) 356456889787STheodore Ts'o clear_opt(sb, DELALLOC); 356556889787STheodore Ts'o } 356656889787STheodore Ts'o 3567ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 3568482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 3569ac27a0ecSDave Kleikamp 3570617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV && 3571617ba13bSMingming Cao (EXT4_HAS_COMPAT_FEATURE(sb, ~0U) || 3572617ba13bSMingming Cao EXT4_HAS_RO_COMPAT_FEATURE(sb, ~0U) || 3573617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, ~0U))) 3574b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 3575b31e1552SEric Sandeen "feature flags set on rev 0 fs, " 3576b31e1552SEric Sandeen "running e2fsck is recommended"); 3577469108ffSTheodore Tso 35782035e776STheodore Ts'o if (IS_EXT2_SB(sb)) { 35792035e776STheodore Ts'o if (ext2_feature_set_ok(sb)) 35802035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext2 file system " 35812035e776STheodore Ts'o "using the ext4 subsystem"); 35822035e776STheodore Ts'o else { 35832035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext2 due " 35842035e776STheodore Ts'o "to feature incompatibilities"); 35852035e776STheodore Ts'o goto failed_mount; 35862035e776STheodore Ts'o } 35872035e776STheodore Ts'o } 35882035e776STheodore Ts'o 35892035e776STheodore Ts'o if (IS_EXT3_SB(sb)) { 35902035e776STheodore Ts'o if (ext3_feature_set_ok(sb)) 35912035e776STheodore Ts'o ext4_msg(sb, KERN_INFO, "mounting ext3 file system " 35922035e776STheodore Ts'o "using the ext4 subsystem"); 35932035e776STheodore Ts'o else { 35942035e776STheodore Ts'o ext4_msg(sb, KERN_ERR, "couldn't mount as ext3 due " 35952035e776STheodore Ts'o "to feature incompatibilities"); 35962035e776STheodore Ts'o goto failed_mount; 35972035e776STheodore Ts'o } 35982035e776STheodore Ts'o } 35992035e776STheodore Ts'o 3600469108ffSTheodore Tso /* 3601ac27a0ecSDave Kleikamp * Check feature flags regardless of the revision level, since we 3602ac27a0ecSDave Kleikamp * previously didn't change the revision level when setting the flags, 3603ac27a0ecSDave Kleikamp * so there is a chance incompat flags are set on a rev 0 filesystem. 3604ac27a0ecSDave Kleikamp */ 3605a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, (sb->s_flags & MS_RDONLY))) 3606ac27a0ecSDave Kleikamp goto failed_mount; 3607a13fb1a4SEric Sandeen 3608261cb20cSJan Kara blocksize = BLOCK_SIZE << le32_to_cpu(es->s_log_block_size); 3609617ba13bSMingming Cao if (blocksize < EXT4_MIN_BLOCK_SIZE || 3610617ba13bSMingming Cao blocksize > EXT4_MAX_BLOCK_SIZE) { 3611b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3612b31e1552SEric Sandeen "Unsupported filesystem blocksize %d", blocksize); 3613ac27a0ecSDave Kleikamp goto failed_mount; 3614ac27a0ecSDave Kleikamp } 3615ac27a0ecSDave Kleikamp 3616ac27a0ecSDave Kleikamp if (sb->s_blocksize != blocksize) { 3617ce40733cSAneesh Kumar K.V /* Validate the filesystem blocksize */ 3618ce40733cSAneesh Kumar K.V if (!sb_set_blocksize(sb, blocksize)) { 3619b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "bad block size %d", 3620ce40733cSAneesh Kumar K.V blocksize); 3621ac27a0ecSDave Kleikamp goto failed_mount; 3622ac27a0ecSDave Kleikamp } 3623ac27a0ecSDave Kleikamp 3624ac27a0ecSDave Kleikamp brelse(bh); 362570bbb3e0SAndrew Morton logical_sb_block = sb_block * EXT4_MIN_BLOCK_SIZE; 362670bbb3e0SAndrew Morton offset = do_div(logical_sb_block, blocksize); 362770bbb3e0SAndrew Morton bh = sb_bread(sb, logical_sb_block); 3628ac27a0ecSDave Kleikamp if (!bh) { 3629b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3630b31e1552SEric Sandeen "Can't read superblock on 2nd try"); 3631ac27a0ecSDave Kleikamp goto failed_mount; 3632ac27a0ecSDave Kleikamp } 36332716b802STheodore Ts'o es = (struct ext4_super_block *)(bh->b_data + offset); 3634ac27a0ecSDave Kleikamp sbi->s_es = es; 3635617ba13bSMingming Cao if (es->s_magic != cpu_to_le16(EXT4_SUPER_MAGIC)) { 3636b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3637b31e1552SEric Sandeen "Magic mismatch, very weird!"); 3638ac27a0ecSDave Kleikamp goto failed_mount; 3639ac27a0ecSDave Kleikamp } 3640ac27a0ecSDave Kleikamp } 3641ac27a0ecSDave Kleikamp 3642a13fb1a4SEric Sandeen has_huge_files = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3643a13fb1a4SEric Sandeen EXT4_FEATURE_RO_COMPAT_HUGE_FILE); 3644f287a1a5STheodore Ts'o sbi->s_bitmap_maxbytes = ext4_max_bitmap_size(sb->s_blocksize_bits, 3645f287a1a5STheodore Ts'o has_huge_files); 3646f287a1a5STheodore Ts'o sb->s_maxbytes = ext4_max_size(sb->s_blocksize_bits, has_huge_files); 3647ac27a0ecSDave Kleikamp 3648617ba13bSMingming Cao if (le32_to_cpu(es->s_rev_level) == EXT4_GOOD_OLD_REV) { 3649617ba13bSMingming Cao sbi->s_inode_size = EXT4_GOOD_OLD_INODE_SIZE; 3650617ba13bSMingming Cao sbi->s_first_ino = EXT4_GOOD_OLD_FIRST_INO; 3651ac27a0ecSDave Kleikamp } else { 3652ac27a0ecSDave Kleikamp sbi->s_inode_size = le16_to_cpu(es->s_inode_size); 3653ac27a0ecSDave Kleikamp sbi->s_first_ino = le32_to_cpu(es->s_first_ino); 3654617ba13bSMingming Cao if ((sbi->s_inode_size < EXT4_GOOD_OLD_INODE_SIZE) || 36551330593eSVignesh Babu (!is_power_of_2(sbi->s_inode_size)) || 3656ac27a0ecSDave Kleikamp (sbi->s_inode_size > blocksize)) { 3657b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3658b31e1552SEric Sandeen "unsupported inode size: %d", 3659ac27a0ecSDave Kleikamp sbi->s_inode_size); 3660ac27a0ecSDave Kleikamp goto failed_mount; 3661ac27a0ecSDave Kleikamp } 3662ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) 3663ef7f3835SKalpak Shah sb->s_time_gran = 1 << (EXT4_EPOCH_BITS - 2); 3664ac27a0ecSDave Kleikamp } 36650b8e58a1SAndreas Dilger 36660d1ee42fSAlexandre Ratchov sbi->s_desc_size = le16_to_cpu(es->s_desc_size); 36670d1ee42fSAlexandre Ratchov if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT)) { 36688fadc143SAlexandre Ratchov if (sbi->s_desc_size < EXT4_MIN_DESC_SIZE_64BIT || 36690d1ee42fSAlexandre Ratchov sbi->s_desc_size > EXT4_MAX_DESC_SIZE || 3670d8ea6cf8Svignesh babu !is_power_of_2(sbi->s_desc_size)) { 3671b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3672b31e1552SEric Sandeen "unsupported descriptor size %lu", 36730d1ee42fSAlexandre Ratchov sbi->s_desc_size); 36740d1ee42fSAlexandre Ratchov goto failed_mount; 36750d1ee42fSAlexandre Ratchov } 36760d1ee42fSAlexandre Ratchov } else 36770d1ee42fSAlexandre Ratchov sbi->s_desc_size = EXT4_MIN_DESC_SIZE; 36780b8e58a1SAndreas Dilger 3679ac27a0ecSDave Kleikamp sbi->s_blocks_per_group = le32_to_cpu(es->s_blocks_per_group); 3680ac27a0ecSDave Kleikamp sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group); 3681b47b6f38SAndries E. Brouwer if (EXT4_INODE_SIZE(sb) == 0 || EXT4_INODES_PER_GROUP(sb) == 0) 3682617ba13bSMingming Cao goto cantfind_ext4; 36830b8e58a1SAndreas Dilger 3684617ba13bSMingming Cao sbi->s_inodes_per_block = blocksize / EXT4_INODE_SIZE(sb); 3685ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_block == 0) 3686617ba13bSMingming Cao goto cantfind_ext4; 3687ac27a0ecSDave Kleikamp sbi->s_itb_per_group = sbi->s_inodes_per_group / 3688ac27a0ecSDave Kleikamp sbi->s_inodes_per_block; 36890d1ee42fSAlexandre Ratchov sbi->s_desc_per_block = blocksize / EXT4_DESC_SIZE(sb); 3690ac27a0ecSDave Kleikamp sbi->s_sbh = bh; 3691ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 3692e57aa839SFengguang Wu sbi->s_addr_per_block_bits = ilog2(EXT4_ADDR_PER_BLOCK(sb)); 3693e57aa839SFengguang Wu sbi->s_desc_per_block_bits = ilog2(EXT4_DESC_PER_BLOCK(sb)); 36940b8e58a1SAndreas Dilger 3695ac27a0ecSDave Kleikamp for (i = 0; i < 4; i++) 3696ac27a0ecSDave Kleikamp sbi->s_hash_seed[i] = le32_to_cpu(es->s_hash_seed[i]); 3697ac27a0ecSDave Kleikamp sbi->s_def_hash_version = es->s_def_hash_version; 3698f99b2589STheodore Ts'o i = le32_to_cpu(es->s_flags); 3699f99b2589STheodore Ts'o if (i & EXT2_FLAGS_UNSIGNED_HASH) 3700f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3701f99b2589STheodore Ts'o else if ((i & EXT2_FLAGS_SIGNED_HASH) == 0) { 3702f99b2589STheodore Ts'o #ifdef __CHAR_UNSIGNED__ 3703f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_UNSIGNED_HASH); 3704f99b2589STheodore Ts'o sbi->s_hash_unsigned = 3; 3705f99b2589STheodore Ts'o #else 3706f99b2589STheodore Ts'o es->s_flags |= cpu_to_le32(EXT2_FLAGS_SIGNED_HASH); 3707f99b2589STheodore Ts'o #endif 3708f99b2589STheodore Ts'o } 3709ac27a0ecSDave Kleikamp 3710281b5995STheodore Ts'o /* Handle clustersize */ 3711281b5995STheodore Ts'o clustersize = BLOCK_SIZE << le32_to_cpu(es->s_log_cluster_size); 3712281b5995STheodore Ts'o has_bigalloc = EXT4_HAS_RO_COMPAT_FEATURE(sb, 3713281b5995STheodore Ts'o EXT4_FEATURE_RO_COMPAT_BIGALLOC); 3714281b5995STheodore Ts'o if (has_bigalloc) { 3715281b5995STheodore Ts'o if (clustersize < blocksize) { 3716281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3717281b5995STheodore Ts'o "cluster size (%d) smaller than " 3718281b5995STheodore Ts'o "block size (%d)", clustersize, blocksize); 3719281b5995STheodore Ts'o goto failed_mount; 3720281b5995STheodore Ts'o } 3721281b5995STheodore Ts'o sbi->s_cluster_bits = le32_to_cpu(es->s_log_cluster_size) - 3722281b5995STheodore Ts'o le32_to_cpu(es->s_log_block_size); 3723281b5995STheodore Ts'o sbi->s_clusters_per_group = 3724281b5995STheodore Ts'o le32_to_cpu(es->s_clusters_per_group); 3725281b5995STheodore Ts'o if (sbi->s_clusters_per_group > blocksize * 8) { 3726281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, 3727281b5995STheodore Ts'o "#clusters per group too big: %lu", 3728281b5995STheodore Ts'o sbi->s_clusters_per_group); 3729281b5995STheodore Ts'o goto failed_mount; 3730281b5995STheodore Ts'o } 3731281b5995STheodore Ts'o if (sbi->s_blocks_per_group != 3732281b5995STheodore Ts'o (sbi->s_clusters_per_group * (clustersize / blocksize))) { 3733281b5995STheodore Ts'o ext4_msg(sb, KERN_ERR, "blocks per group (%lu) and " 3734281b5995STheodore Ts'o "clusters per group (%lu) inconsistent", 3735281b5995STheodore Ts'o sbi->s_blocks_per_group, 3736281b5995STheodore Ts'o sbi->s_clusters_per_group); 3737281b5995STheodore Ts'o goto failed_mount; 3738281b5995STheodore Ts'o } 3739281b5995STheodore Ts'o } else { 3740281b5995STheodore Ts'o if (clustersize != blocksize) { 3741281b5995STheodore Ts'o ext4_warning(sb, "fragment/cluster size (%d) != " 3742281b5995STheodore Ts'o "block size (%d)", clustersize, 3743281b5995STheodore Ts'o blocksize); 3744281b5995STheodore Ts'o clustersize = blocksize; 3745281b5995STheodore Ts'o } 3746ac27a0ecSDave Kleikamp if (sbi->s_blocks_per_group > blocksize * 8) { 3747b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3748b31e1552SEric Sandeen "#blocks per group too big: %lu", 3749ac27a0ecSDave Kleikamp sbi->s_blocks_per_group); 3750ac27a0ecSDave Kleikamp goto failed_mount; 3751ac27a0ecSDave Kleikamp } 3752281b5995STheodore Ts'o sbi->s_clusters_per_group = sbi->s_blocks_per_group; 3753281b5995STheodore Ts'o sbi->s_cluster_bits = 0; 3754281b5995STheodore Ts'o } 3755281b5995STheodore Ts'o sbi->s_cluster_ratio = clustersize / blocksize; 3756281b5995STheodore Ts'o 3757ac27a0ecSDave Kleikamp if (sbi->s_inodes_per_group > blocksize * 8) { 3758b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3759b31e1552SEric Sandeen "#inodes per group too big: %lu", 3760ac27a0ecSDave Kleikamp sbi->s_inodes_per_group); 3761ac27a0ecSDave Kleikamp goto failed_mount; 3762ac27a0ecSDave Kleikamp } 3763ac27a0ecSDave Kleikamp 3764960fd856STheodore Ts'o /* Do we have standard group size of clustersize * 8 blocks ? */ 3765960fd856STheodore Ts'o if (sbi->s_blocks_per_group == clustersize << 3) 3766960fd856STheodore Ts'o set_opt2(sb, STD_GROUP_SIZE); 3767960fd856STheodore Ts'o 3768bf43d84bSEric Sandeen /* 3769bf43d84bSEric Sandeen * Test whether we have more sectors than will fit in sector_t, 3770bf43d84bSEric Sandeen * and whether the max offset is addressable by the page cache. 3771bf43d84bSEric Sandeen */ 37725a9ae68aSDarrick J. Wong err = generic_check_addressable(sb->s_blocksize_bits, 377330ca22c7SPatrick J. LoPresti ext4_blocks_count(es)); 37745a9ae68aSDarrick J. Wong if (err) { 3775b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem" 3776bf43d84bSEric Sandeen " too large to mount safely on this system"); 3777ac27a0ecSDave Kleikamp if (sizeof(sector_t) < 8) 377890c699a9SBartlomiej Zolnierkiewicz ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled"); 3779ac27a0ecSDave Kleikamp goto failed_mount; 3780ac27a0ecSDave Kleikamp } 3781ac27a0ecSDave Kleikamp 3782617ba13bSMingming Cao if (EXT4_BLOCKS_PER_GROUP(sb) == 0) 3783617ba13bSMingming Cao goto cantfind_ext4; 3784e7c95593SEric Sandeen 37850f2ddca6SFrom: Thiemo Nagel /* check blocks count against device size */ 37860f2ddca6SFrom: Thiemo Nagel blocks_count = sb->s_bdev->bd_inode->i_size >> sb->s_blocksize_bits; 37870f2ddca6SFrom: Thiemo Nagel if (blocks_count && ext4_blocks_count(es) > blocks_count) { 3788b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: block count %llu " 3789b31e1552SEric Sandeen "exceeds size of device (%llu blocks)", 37900f2ddca6SFrom: Thiemo Nagel ext4_blocks_count(es), blocks_count); 37910f2ddca6SFrom: Thiemo Nagel goto failed_mount; 37920f2ddca6SFrom: Thiemo Nagel } 37930f2ddca6SFrom: Thiemo Nagel 37944ec11028STheodore Ts'o /* 37954ec11028STheodore Ts'o * It makes no sense for the first data block to be beyond the end 37964ec11028STheodore Ts'o * of the filesystem. 37974ec11028STheodore Ts'o */ 37984ec11028STheodore Ts'o if (le32_to_cpu(es->s_first_data_block) >= ext4_blocks_count(es)) { 3799b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "bad geometry: first data " 3800b31e1552SEric Sandeen "block %u is beyond end of filesystem (%llu)", 3801e7c95593SEric Sandeen le32_to_cpu(es->s_first_data_block), 38024ec11028STheodore Ts'o ext4_blocks_count(es)); 3803e7c95593SEric Sandeen goto failed_mount; 3804e7c95593SEric Sandeen } 3805bd81d8eeSLaurent Vivier blocks_count = (ext4_blocks_count(es) - 3806bd81d8eeSLaurent Vivier le32_to_cpu(es->s_first_data_block) + 3807bd81d8eeSLaurent Vivier EXT4_BLOCKS_PER_GROUP(sb) - 1); 3808bd81d8eeSLaurent Vivier do_div(blocks_count, EXT4_BLOCKS_PER_GROUP(sb)); 38094ec11028STheodore Ts'o if (blocks_count > ((uint64_t)1<<32) - EXT4_DESC_PER_BLOCK(sb)) { 3810b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "groups count too large: %u " 38114ec11028STheodore Ts'o "(block count %llu, first data block %u, " 3812b31e1552SEric Sandeen "blocks per group %lu)", sbi->s_groups_count, 38134ec11028STheodore Ts'o ext4_blocks_count(es), 38144ec11028STheodore Ts'o le32_to_cpu(es->s_first_data_block), 38154ec11028STheodore Ts'o EXT4_BLOCKS_PER_GROUP(sb)); 38164ec11028STheodore Ts'o goto failed_mount; 38174ec11028STheodore Ts'o } 3818bd81d8eeSLaurent Vivier sbi->s_groups_count = blocks_count; 3819fb0a387dSEric Sandeen sbi->s_blockfile_groups = min_t(ext4_group_t, sbi->s_groups_count, 3820fb0a387dSEric Sandeen (EXT4_MAX_BLOCK_FILE_PHYS / EXT4_BLOCKS_PER_GROUP(sb))); 3821617ba13bSMingming Cao db_count = (sbi->s_groups_count + EXT4_DESC_PER_BLOCK(sb) - 1) / 3822617ba13bSMingming Cao EXT4_DESC_PER_BLOCK(sb); 3823f18a5f21STheodore Ts'o sbi->s_group_desc = ext4_kvmalloc(db_count * 3824f18a5f21STheodore Ts'o sizeof(struct buffer_head *), 3825ac27a0ecSDave Kleikamp GFP_KERNEL); 3826ac27a0ecSDave Kleikamp if (sbi->s_group_desc == NULL) { 3827b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "not enough memory"); 38282cde417dSTheodore Ts'o ret = -ENOMEM; 3829ac27a0ecSDave Kleikamp goto failed_mount; 3830ac27a0ecSDave Kleikamp } 3831ac27a0ecSDave Kleikamp 38329f6200bbSTheodore Ts'o if (ext4_proc_root) 38339f6200bbSTheodore Ts'o sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root); 3834240799cdSTheodore Ts'o 383566acdcf4STheodore Ts'o if (sbi->s_proc) 383666acdcf4STheodore Ts'o proc_create_data("options", S_IRUGO, sbi->s_proc, 383766acdcf4STheodore Ts'o &ext4_seq_options_fops, sb); 383866acdcf4STheodore Ts'o 3839705895b6SPekka Enberg bgl_lock_init(sbi->s_blockgroup_lock); 3840ac27a0ecSDave Kleikamp 3841ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) { 384270bbb3e0SAndrew Morton block = descriptor_loc(sb, logical_sb_block, i); 3843ac27a0ecSDave Kleikamp sbi->s_group_desc[i] = sb_bread(sb, block); 3844ac27a0ecSDave Kleikamp if (!sbi->s_group_desc[i]) { 3845b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3846b31e1552SEric Sandeen "can't read group descriptor %d", i); 3847ac27a0ecSDave Kleikamp db_count = i; 3848ac27a0ecSDave Kleikamp goto failed_mount2; 3849ac27a0ecSDave Kleikamp } 3850ac27a0ecSDave Kleikamp } 3851bfff6873SLukas Czerner if (!ext4_check_descriptors(sb, &first_not_zeroed)) { 3852b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "group descriptors corrupted!"); 3853ac27a0ecSDave Kleikamp goto failed_mount2; 3854ac27a0ecSDave Kleikamp } 3855772cb7c8SJose R. Santos if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_FLEX_BG)) 3856772cb7c8SJose R. Santos if (!ext4_fill_flex_info(sb)) { 3857b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 3858b31e1552SEric Sandeen "unable to initialize " 3859b31e1552SEric Sandeen "flex_bg meta info!"); 3860772cb7c8SJose R. Santos goto failed_mount2; 3861772cb7c8SJose R. Santos } 3862772cb7c8SJose R. Santos 3863ac27a0ecSDave Kleikamp sbi->s_gdb_count = db_count; 3864ac27a0ecSDave Kleikamp get_random_bytes(&sbi->s_next_generation, sizeof(u32)); 3865ac27a0ecSDave Kleikamp spin_lock_init(&sbi->s_next_gen_lock); 3866ac27a0ecSDave Kleikamp 386704496411STao Ma init_timer(&sbi->s_err_report); 386804496411STao Ma sbi->s_err_report.function = print_daily_error_info; 386904496411STao Ma sbi->s_err_report.data = (unsigned long) sb; 387004496411STao Ma 3871a75ae78fSDmitry Monakhov /* Register extent status tree shrinker */ 3872d3922a77SZheng Liu ext4_es_register_shrinker(sbi); 3873a75ae78fSDmitry Monakhov 387457042651STheodore Ts'o err = percpu_counter_init(&sbi->s_freeclusters_counter, 38755dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 3876ce7e010aSTheodore Ts'o if (!err) { 3877ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_freeinodes_counter, 3878ce7e010aSTheodore Ts'o ext4_count_free_inodes(sb)); 3879ce7e010aSTheodore Ts'o } 3880ce7e010aSTheodore Ts'o if (!err) { 3881ce7e010aSTheodore Ts'o err = percpu_counter_init(&sbi->s_dirs_counter, 3882ce7e010aSTheodore Ts'o ext4_count_dirs(sb)); 3883ce7e010aSTheodore Ts'o } 3884ce7e010aSTheodore Ts'o if (!err) { 388557042651STheodore Ts'o err = percpu_counter_init(&sbi->s_dirtyclusters_counter, 0); 3886ce7e010aSTheodore Ts'o } 38871ac6466fSTheodore Ts'o if (!err) { 38881ac6466fSTheodore Ts'o err = percpu_counter_init(&sbi->s_extent_cache_cnt, 0); 38891ac6466fSTheodore Ts'o } 3890ce7e010aSTheodore Ts'o if (err) { 3891ce7e010aSTheodore Ts'o ext4_msg(sb, KERN_ERR, "insufficient memory"); 3892ce7e010aSTheodore Ts'o goto failed_mount3; 3893ce7e010aSTheodore Ts'o } 3894ce7e010aSTheodore Ts'o 3895c9de560dSAlex Tomas sbi->s_stripe = ext4_get_stripe_size(sbi); 389667a5da56SZheng Liu sbi->s_extent_max_zeroout_kb = 32; 3897c9de560dSAlex Tomas 3898ac27a0ecSDave Kleikamp /* 3899ac27a0ecSDave Kleikamp * set up enough so that it can read an inode 3900ac27a0ecSDave Kleikamp */ 39019ca92389STheodore Ts'o if (!test_opt(sb, NOLOAD) && 39029ca92389STheodore Ts'o EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 3903617ba13bSMingming Cao sb->s_op = &ext4_sops; 39049ca92389STheodore Ts'o else 39059ca92389STheodore Ts'o sb->s_op = &ext4_nojournal_sops; 3906617ba13bSMingming Cao sb->s_export_op = &ext4_export_ops; 3907617ba13bSMingming Cao sb->s_xattr = ext4_xattr_handlers; 3908ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 3909617ba13bSMingming Cao sb->dq_op = &ext4_quota_operations; 3910262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 39117c319d32SAditya Kali sb->s_qcop = &ext4_qctl_sysfile_operations; 3912262b4662SJan Kara else 3913262b4662SJan Kara sb->s_qcop = &ext4_qctl_operations; 3914ac27a0ecSDave Kleikamp #endif 3915f2fa2ffcSAneesh Kumar K.V memcpy(sb->s_uuid, es->s_uuid, sizeof(es->s_uuid)); 3916f2fa2ffcSAneesh Kumar K.V 3917ac27a0ecSDave Kleikamp INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */ 39183b9d4ed2STheodore Ts'o mutex_init(&sbi->s_orphan_lock); 3919ac27a0ecSDave Kleikamp 3920ac27a0ecSDave Kleikamp sb->s_root = NULL; 3921ac27a0ecSDave Kleikamp 3922ac27a0ecSDave Kleikamp needs_recovery = (es->s_last_orphan != 0 || 3923617ba13bSMingming Cao EXT4_HAS_INCOMPAT_FEATURE(sb, 3924617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_RECOVER)); 3925ac27a0ecSDave Kleikamp 3926c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_MMP) && 3927c5e06d10SJohann Lombardi !(sb->s_flags & MS_RDONLY)) 3928c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, le64_to_cpu(es->s_mmp_block))) 3929c5e06d10SJohann Lombardi goto failed_mount3; 3930c5e06d10SJohann Lombardi 3931ac27a0ecSDave Kleikamp /* 3932ac27a0ecSDave Kleikamp * The first inode we look at is the journal inode. Don't try 3933ac27a0ecSDave Kleikamp * root first: it may be modified in the journal! 3934ac27a0ecSDave Kleikamp */ 3935ac27a0ecSDave Kleikamp if (!test_opt(sb, NOLOAD) && 3936617ba13bSMingming Cao EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 3937617ba13bSMingming Cao if (ext4_load_journal(sb, es, journal_devnum)) 3938ac27a0ecSDave Kleikamp goto failed_mount3; 39390390131bSFrank Mayhar } else if (test_opt(sb, NOLOAD) && !(sb->s_flags & MS_RDONLY) && 39400390131bSFrank Mayhar EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 3941b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "required journal recovery " 3942b31e1552SEric Sandeen "suppressed and not mounted read-only"); 3943744692dcSJiaying Zhang goto failed_mount_wq; 3944ac27a0ecSDave Kleikamp } else { 3945fd8c37ecSTheodore Ts'o clear_opt(sb, DATA_FLAGS); 39460390131bSFrank Mayhar sbi->s_journal = NULL; 39470390131bSFrank Mayhar needs_recovery = 0; 39480390131bSFrank Mayhar goto no_journal; 3949ac27a0ecSDave Kleikamp } 3950ac27a0ecSDave Kleikamp 3951f32aaf2dSTheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_64BIT) && 3952eb40a09cSJose R. Santos !jbd2_journal_set_features(EXT4_SB(sb)->s_journal, 0, 0, 3953eb40a09cSJose R. Santos JBD2_FEATURE_INCOMPAT_64BIT)) { 3954b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Failed to set 64-bit journal feature"); 3955744692dcSJiaying Zhang goto failed_mount_wq; 3956eb40a09cSJose R. Santos } 3957eb40a09cSJose R. Santos 395825ed6e8aSDarrick J. Wong if (!set_journal_csum_feature_set(sb)) { 395925ed6e8aSDarrick J. Wong ext4_msg(sb, KERN_ERR, "Failed to set journal checksum " 396025ed6e8aSDarrick J. Wong "feature set"); 396125ed6e8aSDarrick J. Wong goto failed_mount_wq; 3962d4da6c9cSLinus Torvalds } 3963818d276cSGirish Shilamkar 3964ac27a0ecSDave Kleikamp /* We have now updated the journal if required, so we can 3965ac27a0ecSDave Kleikamp * validate the data journaling mode. */ 3966ac27a0ecSDave Kleikamp switch (test_opt(sb, DATA_FLAGS)) { 3967ac27a0ecSDave Kleikamp case 0: 3968ac27a0ecSDave Kleikamp /* No mode set, assume a default based on the journal 396963f57933SAndrew Morton * capabilities: ORDERED_DATA if the journal can 397063f57933SAndrew Morton * cope, else JOURNAL_DATA 397163f57933SAndrew Morton */ 3972dab291afSMingming Cao if (jbd2_journal_check_available_features 3973dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) 3974fd8c37ecSTheodore Ts'o set_opt(sb, ORDERED_DATA); 3975ac27a0ecSDave Kleikamp else 3976fd8c37ecSTheodore Ts'o set_opt(sb, JOURNAL_DATA); 3977ac27a0ecSDave Kleikamp break; 3978ac27a0ecSDave Kleikamp 3979617ba13bSMingming Cao case EXT4_MOUNT_ORDERED_DATA: 3980617ba13bSMingming Cao case EXT4_MOUNT_WRITEBACK_DATA: 3981dab291afSMingming Cao if (!jbd2_journal_check_available_features 3982dab291afSMingming Cao (sbi->s_journal, 0, 0, JBD2_FEATURE_INCOMPAT_REVOKE)) { 3983b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Journal does not support " 3984b31e1552SEric Sandeen "requested data journaling mode"); 3985744692dcSJiaying Zhang goto failed_mount_wq; 3986ac27a0ecSDave Kleikamp } 3987ac27a0ecSDave Kleikamp default: 3988ac27a0ecSDave Kleikamp break; 3989ac27a0ecSDave Kleikamp } 3990b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 3991ac27a0ecSDave Kleikamp 399218aadd47SBobi Jam sbi->s_journal->j_commit_callback = ext4_journal_commit_callback; 399318aadd47SBobi Jam 3994ce7e010aSTheodore Ts'o /* 3995ce7e010aSTheodore Ts'o * The journal may have updated the bg summary counts, so we 3996ce7e010aSTheodore Ts'o * need to update the global counters. 3997ce7e010aSTheodore Ts'o */ 399857042651STheodore Ts'o percpu_counter_set(&sbi->s_freeclusters_counter, 39995dee5437STheodore Ts'o ext4_count_free_clusters(sb)); 4000ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_freeinodes_counter, 400184061e07SDmitry Monakhov ext4_count_free_inodes(sb)); 4002ce7e010aSTheodore Ts'o percpu_counter_set(&sbi->s_dirs_counter, 400384061e07SDmitry Monakhov ext4_count_dirs(sb)); 400457042651STheodore Ts'o percpu_counter_set(&sbi->s_dirtyclusters_counter, 0); 4005206f7ab4SChristoph Hellwig 4006ce7e010aSTheodore Ts'o no_journal: 4007fd89d5f2STejun Heo /* 4008952fc18eSTheodore Ts'o * Get the # of file system overhead blocks from the 4009952fc18eSTheodore Ts'o * superblock if present. 4010952fc18eSTheodore Ts'o */ 4011952fc18eSTheodore Ts'o if (es->s_overhead_clusters) 4012952fc18eSTheodore Ts'o sbi->s_overhead = le32_to_cpu(es->s_overhead_clusters); 4013952fc18eSTheodore Ts'o else { 401407aa2ea1SLukas Czerner err = ext4_calculate_overhead(sb); 401507aa2ea1SLukas Czerner if (err) 4016952fc18eSTheodore Ts'o goto failed_mount_wq; 4017952fc18eSTheodore Ts'o } 4018952fc18eSTheodore Ts'o 4019952fc18eSTheodore Ts'o /* 4020fd89d5f2STejun Heo * The maximum number of concurrent works can be high and 4021fd89d5f2STejun Heo * concurrency isn't really necessary. Limit it to 1. 4022fd89d5f2STejun Heo */ 40232e8fa54eSJan Kara EXT4_SB(sb)->rsv_conversion_wq = 40242e8fa54eSJan Kara alloc_workqueue("ext4-rsv-conversion", WQ_MEM_RECLAIM | WQ_UNBOUND, 1); 40252e8fa54eSJan Kara if (!EXT4_SB(sb)->rsv_conversion_wq) { 40262e8fa54eSJan Kara printk(KERN_ERR "EXT4-fs: failed to create workqueue\n"); 402707aa2ea1SLukas Czerner ret = -ENOMEM; 40282e8fa54eSJan Kara goto failed_mount4; 40292e8fa54eSJan Kara } 40302e8fa54eSJan Kara 4031ac27a0ecSDave Kleikamp /* 4032dab291afSMingming Cao * The jbd2_journal_load will have done any necessary log recovery, 4033ac27a0ecSDave Kleikamp * so we can safely mount the rest of the filesystem now. 4034ac27a0ecSDave Kleikamp */ 4035ac27a0ecSDave Kleikamp 40361d1fe1eeSDavid Howells root = ext4_iget(sb, EXT4_ROOT_INO); 40371d1fe1eeSDavid Howells if (IS_ERR(root)) { 4038b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root inode failed"); 40391d1fe1eeSDavid Howells ret = PTR_ERR(root); 404032a9bb57SManish Katiyar root = NULL; 4041ac27a0ecSDave Kleikamp goto failed_mount4; 4042ac27a0ecSDave Kleikamp } 4043ac27a0ecSDave Kleikamp if (!S_ISDIR(root->i_mode) || !root->i_blocks || !root->i_size) { 4044b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "corrupt root inode, run e2fsck"); 404594bf608aSAl Viro iput(root); 4046ac27a0ecSDave Kleikamp goto failed_mount4; 4047ac27a0ecSDave Kleikamp } 404848fde701SAl Viro sb->s_root = d_make_root(root); 40491d1fe1eeSDavid Howells if (!sb->s_root) { 4050b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "get root dentry failed"); 40511d1fe1eeSDavid Howells ret = -ENOMEM; 40521d1fe1eeSDavid Howells goto failed_mount4; 40531d1fe1eeSDavid Howells } 4054ac27a0ecSDave Kleikamp 40557e84b621SEric Sandeen if (ext4_setup_super(sb, es, sb->s_flags & MS_RDONLY)) 40567e84b621SEric Sandeen sb->s_flags |= MS_RDONLY; 4057ef7f3835SKalpak Shah 4058ef7f3835SKalpak Shah /* determine the minimum size of new large inodes, if present */ 4059ef7f3835SKalpak Shah if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE) { 4060ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4061ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4062ef7f3835SKalpak Shah if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 4063ef7f3835SKalpak Shah EXT4_FEATURE_RO_COMPAT_EXTRA_ISIZE)) { 4064ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4065ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize)) 4066ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4067ef7f3835SKalpak Shah le16_to_cpu(es->s_want_extra_isize); 4068ef7f3835SKalpak Shah if (sbi->s_want_extra_isize < 4069ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize)) 4070ef7f3835SKalpak Shah sbi->s_want_extra_isize = 4071ef7f3835SKalpak Shah le16_to_cpu(es->s_min_extra_isize); 4072ef7f3835SKalpak Shah } 4073ef7f3835SKalpak Shah } 4074ef7f3835SKalpak Shah /* Check if enough inode space is available */ 4075ef7f3835SKalpak Shah if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize > 4076ef7f3835SKalpak Shah sbi->s_inode_size) { 4077ef7f3835SKalpak Shah sbi->s_want_extra_isize = sizeof(struct ext4_inode) - 4078ef7f3835SKalpak Shah EXT4_GOOD_OLD_INODE_SIZE; 4079b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "required extra inode space not" 4080b31e1552SEric Sandeen "available"); 4081ef7f3835SKalpak Shah } 4082ef7f3835SKalpak Shah 4083*30fac0f7SJan Kara err = ext4_reserve_clusters(sbi, ext4_calculate_resv_clusters(sb)); 408427dd4385SLukas Czerner if (err) { 408527dd4385SLukas Czerner ext4_msg(sb, KERN_ERR, "failed to reserve %llu clusters for " 4086*30fac0f7SJan Kara "reserved pool", ext4_calculate_resv_clusters(sb)); 408727dd4385SLukas Czerner goto failed_mount4a; 408827dd4385SLukas Czerner } 408927dd4385SLukas Czerner 40906fd058f7STheodore Ts'o err = ext4_setup_system_zone(sb); 40916fd058f7STheodore Ts'o if (err) { 4092b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to initialize system " 4093fbe845ddSCurt Wohlgemuth "zone (%d)", err); 409494bf608aSAl Viro goto failed_mount4a; 40956fd058f7STheodore Ts'o } 40966fd058f7STheodore Ts'o 4097c2774d84SAneesh Kumar K.V ext4_ext_init(sb); 40989d99012fSAkira Fujita err = ext4_mb_init(sb); 4099c2774d84SAneesh Kumar K.V if (err) { 4100421f91d2SUwe Kleine-König ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)", 4101c2774d84SAneesh Kumar K.V err); 4102dcf2d804STao Ma goto failed_mount5; 4103c2774d84SAneesh Kumar K.V } 4104c2774d84SAneesh Kumar K.V 4105bfff6873SLukas Czerner err = ext4_register_li_request(sb, first_not_zeroed); 4106bfff6873SLukas Czerner if (err) 4107dcf2d804STao Ma goto failed_mount6; 4108bfff6873SLukas Czerner 41093197ebdbSTheodore Ts'o sbi->s_kobj.kset = ext4_kset; 41103197ebdbSTheodore Ts'o init_completion(&sbi->s_kobj_unregister); 41113197ebdbSTheodore Ts'o err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL, 41123197ebdbSTheodore Ts'o "%s", sb->s_id); 4113dcf2d804STao Ma if (err) 4114dcf2d804STao Ma goto failed_mount7; 41153197ebdbSTheodore Ts'o 41169b2ff357SJan Kara #ifdef CONFIG_QUOTA 41179b2ff357SJan Kara /* Enable quota usage during mount. */ 41189b2ff357SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) && 41199b2ff357SJan Kara !(sb->s_flags & MS_RDONLY)) { 41209b2ff357SJan Kara err = ext4_enable_quotas(sb); 41219b2ff357SJan Kara if (err) 41229b2ff357SJan Kara goto failed_mount8; 41239b2ff357SJan Kara } 41249b2ff357SJan Kara #endif /* CONFIG_QUOTA */ 41259b2ff357SJan Kara 4126617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS; 4127617ba13bSMingming Cao ext4_orphan_cleanup(sb, es); 4128617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state &= ~EXT4_ORPHAN_FS; 41290390131bSFrank Mayhar if (needs_recovery) { 4130b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "recovery complete"); 4131617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 41320390131bSFrank Mayhar } 41330390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal) { 41340390131bSFrank Mayhar if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) 41350390131bSFrank Mayhar descr = " journalled data mode"; 41360390131bSFrank Mayhar else if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA) 41370390131bSFrank Mayhar descr = " ordered data mode"; 41380390131bSFrank Mayhar else 41390390131bSFrank Mayhar descr = " writeback data mode"; 41400390131bSFrank Mayhar } else 41410390131bSFrank Mayhar descr = "out journal"; 41420390131bSFrank Mayhar 414379add3a3SLukas Czerner if (test_opt(sb, DISCARD)) { 414479add3a3SLukas Czerner struct request_queue *q = bdev_get_queue(sb->s_bdev); 414579add3a3SLukas Czerner if (!blk_queue_discard(q)) 414679add3a3SLukas Czerner ext4_msg(sb, KERN_WARNING, 414779add3a3SLukas Czerner "mounting with \"discard\" option, but " 414879add3a3SLukas Czerner "the device does not support discard"); 414979add3a3SLukas Czerner } 415079add3a3SLukas Czerner 4151d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "mounted filesystem with%s. " 41528b67f04aSTheodore Ts'o "Opts: %s%s%s", descr, sbi->s_es->s_mount_opts, 41538b67f04aSTheodore Ts'o *sbi->s_es->s_mount_opts ? "; " : "", orig_data); 4154ac27a0ecSDave Kleikamp 415566e61a9eSTheodore Ts'o if (es->s_error_count) 415666e61a9eSTheodore Ts'o mod_timer(&sbi->s_err_report, jiffies + 300*HZ); /* 5 minutes */ 4157ac27a0ecSDave Kleikamp 4158efbed4dcSTheodore Ts'o /* Enable message ratelimiting. Default is 10 messages per 5 secs. */ 4159efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_err_ratelimit_state, 5 * HZ, 10); 4160efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_warning_ratelimit_state, 5 * HZ, 10); 4161efbed4dcSTheodore Ts'o ratelimit_state_init(&sbi->s_msg_ratelimit_state, 5 * HZ, 10); 4162efbed4dcSTheodore Ts'o 4163d4c402d9SCurt Wohlgemuth kfree(orig_data); 4164ac27a0ecSDave Kleikamp return 0; 4165ac27a0ecSDave Kleikamp 4166617ba13bSMingming Cao cantfind_ext4: 4167ac27a0ecSDave Kleikamp if (!silent) 4168b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem"); 4169ac27a0ecSDave Kleikamp goto failed_mount; 4170ac27a0ecSDave Kleikamp 417172ba7450STheodore Ts'o #ifdef CONFIG_QUOTA 417272ba7450STheodore Ts'o failed_mount8: 417372ba7450STheodore Ts'o kobject_del(&sbi->s_kobj); 417472ba7450STheodore Ts'o #endif 4175dcf2d804STao Ma failed_mount7: 4176dcf2d804STao Ma ext4_unregister_li_request(sb); 4177dcf2d804STao Ma failed_mount6: 4178dcf2d804STao Ma ext4_mb_release(sb); 417994bf608aSAl Viro failed_mount5: 418094bf608aSAl Viro ext4_ext_release(sb); 4181dcf2d804STao Ma ext4_release_system_zone(sb); 418294bf608aSAl Viro failed_mount4a: 418394bf608aSAl Viro dput(sb->s_root); 418432a9bb57SManish Katiyar sb->s_root = NULL; 418594bf608aSAl Viro failed_mount4: 4186b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "mount failed"); 41872e8fa54eSJan Kara if (EXT4_SB(sb)->rsv_conversion_wq) 41882e8fa54eSJan Kara destroy_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 41894c0425ffSMingming Cao failed_mount_wq: 41900390131bSFrank Mayhar if (sbi->s_journal) { 4191dab291afSMingming Cao jbd2_journal_destroy(sbi->s_journal); 419247b4a50bSJan Kara sbi->s_journal = NULL; 41930390131bSFrank Mayhar } 4194ac27a0ecSDave Kleikamp failed_mount3: 4195d3922a77SZheng Liu ext4_es_unregister_shrinker(sbi); 41969105bb14SAl Viro del_timer_sync(&sbi->s_err_report); 41979933fc0aSTheodore Ts'o if (sbi->s_flex_groups) 41989933fc0aSTheodore Ts'o ext4_kvfree(sbi->s_flex_groups); 419957042651STheodore Ts'o percpu_counter_destroy(&sbi->s_freeclusters_counter); 4200ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_freeinodes_counter); 4201ce7e010aSTheodore Ts'o percpu_counter_destroy(&sbi->s_dirs_counter); 420257042651STheodore Ts'o percpu_counter_destroy(&sbi->s_dirtyclusters_counter); 42031ac6466fSTheodore Ts'o percpu_counter_destroy(&sbi->s_extent_cache_cnt); 4204c5e06d10SJohann Lombardi if (sbi->s_mmp_tsk) 4205c5e06d10SJohann Lombardi kthread_stop(sbi->s_mmp_tsk); 4206ac27a0ecSDave Kleikamp failed_mount2: 4207ac27a0ecSDave Kleikamp for (i = 0; i < db_count; i++) 4208ac27a0ecSDave Kleikamp brelse(sbi->s_group_desc[i]); 4209f18a5f21STheodore Ts'o ext4_kvfree(sbi->s_group_desc); 4210ac27a0ecSDave Kleikamp failed_mount: 42110441984aSDarrick J. Wong if (sbi->s_chksum_driver) 42120441984aSDarrick J. Wong crypto_free_shash(sbi->s_chksum_driver); 4213240799cdSTheodore Ts'o if (sbi->s_proc) { 421466acdcf4STheodore Ts'o remove_proc_entry("options", sbi->s_proc); 42159f6200bbSTheodore Ts'o remove_proc_entry(sb->s_id, ext4_proc_root); 4216240799cdSTheodore Ts'o } 4217ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4218ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4219ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4220ac27a0ecSDave Kleikamp #endif 4221617ba13bSMingming Cao ext4_blkdev_remove(sbi); 4222ac27a0ecSDave Kleikamp brelse(bh); 4223ac27a0ecSDave Kleikamp out_fail: 4224ac27a0ecSDave Kleikamp sb->s_fs_info = NULL; 4225f6830165SManish Katiyar kfree(sbi->s_blockgroup_lock); 4226ac27a0ecSDave Kleikamp kfree(sbi); 4227dcc7dae3SCyrill Gorcunov out_free_orig: 4228d4c402d9SCurt Wohlgemuth kfree(orig_data); 422907aa2ea1SLukas Czerner return err ? err : ret; 4230ac27a0ecSDave Kleikamp } 4231ac27a0ecSDave Kleikamp 4232ac27a0ecSDave Kleikamp /* 4233ac27a0ecSDave Kleikamp * Setup any per-fs journal parameters now. We'll do this both on 4234ac27a0ecSDave Kleikamp * initial mount, once the journal has been initialised but before we've 4235ac27a0ecSDave Kleikamp * done any recovery; and again on any subsequent remount. 4236ac27a0ecSDave Kleikamp */ 4237617ba13bSMingming Cao static void ext4_init_journal_params(struct super_block *sb, journal_t *journal) 4238ac27a0ecSDave Kleikamp { 4239617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4240ac27a0ecSDave Kleikamp 4241ac27a0ecSDave Kleikamp journal->j_commit_interval = sbi->s_commit_interval; 424230773840STheodore Ts'o journal->j_min_batch_time = sbi->s_min_batch_time; 424330773840STheodore Ts'o journal->j_max_batch_time = sbi->s_max_batch_time; 4244ac27a0ecSDave Kleikamp 4245a931da6aSTheodore Ts'o write_lock(&journal->j_state_lock); 4246ac27a0ecSDave Kleikamp if (test_opt(sb, BARRIER)) 4247dab291afSMingming Cao journal->j_flags |= JBD2_BARRIER; 4248ac27a0ecSDave Kleikamp else 4249dab291afSMingming Cao journal->j_flags &= ~JBD2_BARRIER; 42505bf5683aSHidehiro Kawai if (test_opt(sb, DATA_ERR_ABORT)) 42515bf5683aSHidehiro Kawai journal->j_flags |= JBD2_ABORT_ON_SYNCDATA_ERR; 42525bf5683aSHidehiro Kawai else 42535bf5683aSHidehiro Kawai journal->j_flags &= ~JBD2_ABORT_ON_SYNCDATA_ERR; 4254a931da6aSTheodore Ts'o write_unlock(&journal->j_state_lock); 4255ac27a0ecSDave Kleikamp } 4256ac27a0ecSDave Kleikamp 4257617ba13bSMingming Cao static journal_t *ext4_get_journal(struct super_block *sb, 4258ac27a0ecSDave Kleikamp unsigned int journal_inum) 4259ac27a0ecSDave Kleikamp { 4260ac27a0ecSDave Kleikamp struct inode *journal_inode; 4261ac27a0ecSDave Kleikamp journal_t *journal; 4262ac27a0ecSDave Kleikamp 42630390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 42640390131bSFrank Mayhar 4265ac27a0ecSDave Kleikamp /* First, test for the existence of a valid inode on disk. Bad 4266ac27a0ecSDave Kleikamp * things happen if we iget() an unused inode, as the subsequent 4267ac27a0ecSDave Kleikamp * iput() will try to delete it. */ 4268ac27a0ecSDave Kleikamp 42691d1fe1eeSDavid Howells journal_inode = ext4_iget(sb, journal_inum); 42701d1fe1eeSDavid Howells if (IS_ERR(journal_inode)) { 4271b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "no journal found"); 4272ac27a0ecSDave Kleikamp return NULL; 4273ac27a0ecSDave Kleikamp } 4274ac27a0ecSDave Kleikamp if (!journal_inode->i_nlink) { 4275ac27a0ecSDave Kleikamp make_bad_inode(journal_inode); 4276ac27a0ecSDave Kleikamp iput(journal_inode); 4277b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal inode is deleted"); 4278ac27a0ecSDave Kleikamp return NULL; 4279ac27a0ecSDave Kleikamp } 4280ac27a0ecSDave Kleikamp 4281e5f8eab8STheodore Ts'o jbd_debug(2, "Journal inode found at %p: %lld bytes\n", 4282ac27a0ecSDave Kleikamp journal_inode, journal_inode->i_size); 42831d1fe1eeSDavid Howells if (!S_ISREG(journal_inode->i_mode)) { 4284b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "invalid journal inode"); 4285ac27a0ecSDave Kleikamp iput(journal_inode); 4286ac27a0ecSDave Kleikamp return NULL; 4287ac27a0ecSDave Kleikamp } 4288ac27a0ecSDave Kleikamp 4289dab291afSMingming Cao journal = jbd2_journal_init_inode(journal_inode); 4290ac27a0ecSDave Kleikamp if (!journal) { 4291b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "Could not load journal inode"); 4292ac27a0ecSDave Kleikamp iput(journal_inode); 4293ac27a0ecSDave Kleikamp return NULL; 4294ac27a0ecSDave Kleikamp } 4295ac27a0ecSDave Kleikamp journal->j_private = sb; 4296617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4297ac27a0ecSDave Kleikamp return journal; 4298ac27a0ecSDave Kleikamp } 4299ac27a0ecSDave Kleikamp 4300617ba13bSMingming Cao static journal_t *ext4_get_dev_journal(struct super_block *sb, 4301ac27a0ecSDave Kleikamp dev_t j_dev) 4302ac27a0ecSDave Kleikamp { 4303ac27a0ecSDave Kleikamp struct buffer_head *bh; 4304ac27a0ecSDave Kleikamp journal_t *journal; 4305617ba13bSMingming Cao ext4_fsblk_t start; 4306617ba13bSMingming Cao ext4_fsblk_t len; 4307ac27a0ecSDave Kleikamp int hblock, blocksize; 4308617ba13bSMingming Cao ext4_fsblk_t sb_block; 4309ac27a0ecSDave Kleikamp unsigned long offset; 4310617ba13bSMingming Cao struct ext4_super_block *es; 4311ac27a0ecSDave Kleikamp struct block_device *bdev; 4312ac27a0ecSDave Kleikamp 43130390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43140390131bSFrank Mayhar 4315b31e1552SEric Sandeen bdev = ext4_blkdev_get(j_dev, sb); 4316ac27a0ecSDave Kleikamp if (bdev == NULL) 4317ac27a0ecSDave Kleikamp return NULL; 4318ac27a0ecSDave Kleikamp 4319ac27a0ecSDave Kleikamp blocksize = sb->s_blocksize; 4320e1defc4fSMartin K. Petersen hblock = bdev_logical_block_size(bdev); 4321ac27a0ecSDave Kleikamp if (blocksize < hblock) { 4322b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4323b31e1552SEric Sandeen "blocksize too small for journal device"); 4324ac27a0ecSDave Kleikamp goto out_bdev; 4325ac27a0ecSDave Kleikamp } 4326ac27a0ecSDave Kleikamp 4327617ba13bSMingming Cao sb_block = EXT4_MIN_BLOCK_SIZE / blocksize; 4328617ba13bSMingming Cao offset = EXT4_MIN_BLOCK_SIZE % blocksize; 4329ac27a0ecSDave Kleikamp set_blocksize(bdev, blocksize); 4330ac27a0ecSDave Kleikamp if (!(bh = __bread(bdev, sb_block, blocksize))) { 4331b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "couldn't read superblock of " 4332b31e1552SEric Sandeen "external journal"); 4333ac27a0ecSDave Kleikamp goto out_bdev; 4334ac27a0ecSDave Kleikamp } 4335ac27a0ecSDave Kleikamp 43362716b802STheodore Ts'o es = (struct ext4_super_block *) (bh->b_data + offset); 4337617ba13bSMingming Cao if ((le16_to_cpu(es->s_magic) != EXT4_SUPER_MAGIC) || 4338ac27a0ecSDave Kleikamp !(le32_to_cpu(es->s_feature_incompat) & 4339617ba13bSMingming Cao EXT4_FEATURE_INCOMPAT_JOURNAL_DEV)) { 4340b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "external journal has " 4341b31e1552SEric Sandeen "bad superblock"); 4342ac27a0ecSDave Kleikamp brelse(bh); 4343ac27a0ecSDave Kleikamp goto out_bdev; 4344ac27a0ecSDave Kleikamp } 4345ac27a0ecSDave Kleikamp 4346617ba13bSMingming Cao if (memcmp(EXT4_SB(sb)->s_es->s_journal_uuid, es->s_uuid, 16)) { 4347b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "journal UUID does not match"); 4348ac27a0ecSDave Kleikamp brelse(bh); 4349ac27a0ecSDave Kleikamp goto out_bdev; 4350ac27a0ecSDave Kleikamp } 4351ac27a0ecSDave Kleikamp 4352bd81d8eeSLaurent Vivier len = ext4_blocks_count(es); 4353ac27a0ecSDave Kleikamp start = sb_block + 1; 4354ac27a0ecSDave Kleikamp brelse(bh); /* we're done with the superblock */ 4355ac27a0ecSDave Kleikamp 4356dab291afSMingming Cao journal = jbd2_journal_init_dev(bdev, sb->s_bdev, 4357ac27a0ecSDave Kleikamp start, len, blocksize); 4358ac27a0ecSDave Kleikamp if (!journal) { 4359b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "failed to create device journal"); 4360ac27a0ecSDave Kleikamp goto out_bdev; 4361ac27a0ecSDave Kleikamp } 4362ac27a0ecSDave Kleikamp journal->j_private = sb; 43639f203507STheodore Ts'o ll_rw_block(READ | REQ_META | REQ_PRIO, 1, &journal->j_sb_buffer); 4364ac27a0ecSDave Kleikamp wait_on_buffer(journal->j_sb_buffer); 4365ac27a0ecSDave Kleikamp if (!buffer_uptodate(journal->j_sb_buffer)) { 4366b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error on journal device"); 4367ac27a0ecSDave Kleikamp goto out_journal; 4368ac27a0ecSDave Kleikamp } 4369ac27a0ecSDave Kleikamp if (be32_to_cpu(journal->j_superblock->s_nr_users) != 1) { 4370b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "External journal has more than one " 4371b31e1552SEric Sandeen "user (unsupported) - %d", 4372ac27a0ecSDave Kleikamp be32_to_cpu(journal->j_superblock->s_nr_users)); 4373ac27a0ecSDave Kleikamp goto out_journal; 4374ac27a0ecSDave Kleikamp } 4375617ba13bSMingming Cao EXT4_SB(sb)->journal_bdev = bdev; 4376617ba13bSMingming Cao ext4_init_journal_params(sb, journal); 4377ac27a0ecSDave Kleikamp return journal; 43780b8e58a1SAndreas Dilger 4379ac27a0ecSDave Kleikamp out_journal: 4380dab291afSMingming Cao jbd2_journal_destroy(journal); 4381ac27a0ecSDave Kleikamp out_bdev: 4382617ba13bSMingming Cao ext4_blkdev_put(bdev); 4383ac27a0ecSDave Kleikamp return NULL; 4384ac27a0ecSDave Kleikamp } 4385ac27a0ecSDave Kleikamp 4386617ba13bSMingming Cao static int ext4_load_journal(struct super_block *sb, 4387617ba13bSMingming Cao struct ext4_super_block *es, 4388ac27a0ecSDave Kleikamp unsigned long journal_devnum) 4389ac27a0ecSDave Kleikamp { 4390ac27a0ecSDave Kleikamp journal_t *journal; 4391ac27a0ecSDave Kleikamp unsigned int journal_inum = le32_to_cpu(es->s_journal_inum); 4392ac27a0ecSDave Kleikamp dev_t journal_dev; 4393ac27a0ecSDave Kleikamp int err = 0; 4394ac27a0ecSDave Kleikamp int really_read_only; 4395ac27a0ecSDave Kleikamp 43960390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 43970390131bSFrank Mayhar 4398ac27a0ecSDave Kleikamp if (journal_devnum && 4399ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4400b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "external journal device major/minor " 4401b31e1552SEric Sandeen "numbers have changed"); 4402ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(journal_devnum); 4403ac27a0ecSDave Kleikamp } else 4404ac27a0ecSDave Kleikamp journal_dev = new_decode_dev(le32_to_cpu(es->s_journal_dev)); 4405ac27a0ecSDave Kleikamp 4406ac27a0ecSDave Kleikamp really_read_only = bdev_read_only(sb->s_bdev); 4407ac27a0ecSDave Kleikamp 4408ac27a0ecSDave Kleikamp /* 4409ac27a0ecSDave Kleikamp * Are we loading a blank journal or performing recovery after a 4410ac27a0ecSDave Kleikamp * crash? For recovery, we need to check in advance whether we 4411ac27a0ecSDave Kleikamp * can get read-write access to the device. 4412ac27a0ecSDave Kleikamp */ 4413617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) { 4414ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) { 4415b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "INFO: recovery " 4416b31e1552SEric Sandeen "required on readonly filesystem"); 4417ac27a0ecSDave Kleikamp if (really_read_only) { 4418b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "write access " 4419b31e1552SEric Sandeen "unavailable, cannot proceed"); 4420ac27a0ecSDave Kleikamp return -EROFS; 4421ac27a0ecSDave Kleikamp } 4422b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "write access will " 4423b31e1552SEric Sandeen "be enabled during recovery"); 4424ac27a0ecSDave Kleikamp } 4425ac27a0ecSDave Kleikamp } 4426ac27a0ecSDave Kleikamp 4427ac27a0ecSDave Kleikamp if (journal_inum && journal_dev) { 4428b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "filesystem has both journal " 4429b31e1552SEric Sandeen "and inode journals!"); 4430ac27a0ecSDave Kleikamp return -EINVAL; 4431ac27a0ecSDave Kleikamp } 4432ac27a0ecSDave Kleikamp 4433ac27a0ecSDave Kleikamp if (journal_inum) { 4434617ba13bSMingming Cao if (!(journal = ext4_get_journal(sb, journal_inum))) 4435ac27a0ecSDave Kleikamp return -EINVAL; 4436ac27a0ecSDave Kleikamp } else { 4437617ba13bSMingming Cao if (!(journal = ext4_get_dev_journal(sb, journal_dev))) 4438ac27a0ecSDave Kleikamp return -EINVAL; 4439ac27a0ecSDave Kleikamp } 4440ac27a0ecSDave Kleikamp 444190576c0bSTheodore Ts'o if (!(journal->j_flags & JBD2_BARRIER)) 4442b31e1552SEric Sandeen ext4_msg(sb, KERN_INFO, "barriers disabled"); 44434776004fSTheodore Ts'o 4444617ba13bSMingming Cao if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER)) 4445dab291afSMingming Cao err = jbd2_journal_wipe(journal, !really_read_only); 44461c13d5c0STheodore Ts'o if (!err) { 44471c13d5c0STheodore Ts'o char *save = kmalloc(EXT4_S_ERR_LEN, GFP_KERNEL); 44481c13d5c0STheodore Ts'o if (save) 44491c13d5c0STheodore Ts'o memcpy(save, ((char *) es) + 44501c13d5c0STheodore Ts'o EXT4_S_ERR_START, EXT4_S_ERR_LEN); 4451dab291afSMingming Cao err = jbd2_journal_load(journal); 44521c13d5c0STheodore Ts'o if (save) 44531c13d5c0STheodore Ts'o memcpy(((char *) es) + EXT4_S_ERR_START, 44541c13d5c0STheodore Ts'o save, EXT4_S_ERR_LEN); 44551c13d5c0STheodore Ts'o kfree(save); 44561c13d5c0STheodore Ts'o } 4457ac27a0ecSDave Kleikamp 4458ac27a0ecSDave Kleikamp if (err) { 4459b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "error loading journal"); 4460dab291afSMingming Cao jbd2_journal_destroy(journal); 4461ac27a0ecSDave Kleikamp return err; 4462ac27a0ecSDave Kleikamp } 4463ac27a0ecSDave Kleikamp 4464617ba13bSMingming Cao EXT4_SB(sb)->s_journal = journal; 4465617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4466ac27a0ecSDave Kleikamp 4467c41303ceSMaciej Żenczykowski if (!really_read_only && journal_devnum && 4468ac27a0ecSDave Kleikamp journal_devnum != le32_to_cpu(es->s_journal_dev)) { 4469ac27a0ecSDave Kleikamp es->s_journal_dev = cpu_to_le32(journal_devnum); 4470ac27a0ecSDave Kleikamp 4471ac27a0ecSDave Kleikamp /* Make sure we flush the recovery flag to disk. */ 4472e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4473ac27a0ecSDave Kleikamp } 4474ac27a0ecSDave Kleikamp 4475ac27a0ecSDave Kleikamp return 0; 4476ac27a0ecSDave Kleikamp } 4477ac27a0ecSDave Kleikamp 4478e2d67052STheodore Ts'o static int ext4_commit_super(struct super_block *sb, int sync) 4479ac27a0ecSDave Kleikamp { 4480e2d67052STheodore Ts'o struct ext4_super_block *es = EXT4_SB(sb)->s_es; 4481617ba13bSMingming Cao struct buffer_head *sbh = EXT4_SB(sb)->s_sbh; 4482c4be0c1dSTakashi Sato int error = 0; 4483ac27a0ecSDave Kleikamp 44847c2e7087STheodore Ts'o if (!sbh || block_device_ejected(sb)) 4485c4be0c1dSTakashi Sato return error; 4486914258bfSTheodore Ts'o if (buffer_write_io_error(sbh)) { 4487914258bfSTheodore Ts'o /* 4488914258bfSTheodore Ts'o * Oh, dear. A previous attempt to write the 4489914258bfSTheodore Ts'o * superblock failed. This could happen because the 4490914258bfSTheodore Ts'o * USB device was yanked out. Or it could happen to 4491914258bfSTheodore Ts'o * be a transient write error and maybe the block will 4492914258bfSTheodore Ts'o * be remapped. Nothing we can do but to retry the 4493914258bfSTheodore Ts'o * write and hope for the best. 4494914258bfSTheodore Ts'o */ 4495b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "previous I/O error to " 4496b31e1552SEric Sandeen "superblock detected"); 4497914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4498914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4499914258bfSTheodore Ts'o } 450071290b36STheodore Ts'o /* 450171290b36STheodore Ts'o * If the file system is mounted read-only, don't update the 450271290b36STheodore Ts'o * superblock write time. This avoids updating the superblock 450371290b36STheodore Ts'o * write time when we are mounting the root file system 450471290b36STheodore Ts'o * read/only but we need to replay the journal; at that point, 450571290b36STheodore Ts'o * for people who are east of GMT and who make their clock 450671290b36STheodore Ts'o * tick in localtime for Windows bug-for-bug compatibility, 450771290b36STheodore Ts'o * the clock is set in the future, and this will cause e2fsck 450871290b36STheodore Ts'o * to complain and force a full file system check. 450971290b36STheodore Ts'o */ 451071290b36STheodore Ts'o if (!(sb->s_flags & MS_RDONLY)) 4511ac27a0ecSDave Kleikamp es->s_wtime = cpu_to_le32(get_seconds()); 4512f613dfcbSTheodore Ts'o if (sb->s_bdev->bd_part) 4513afc32f7eSTheodore Ts'o es->s_kbytes_written = 4514afc32f7eSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written + 4515afc32f7eSTheodore Ts'o ((part_stat_read(sb->s_bdev->bd_part, sectors[1]) - 4516afc32f7eSTheodore Ts'o EXT4_SB(sb)->s_sectors_written_start) >> 1)); 4517f613dfcbSTheodore Ts'o else 4518f613dfcbSTheodore Ts'o es->s_kbytes_written = 4519f613dfcbSTheodore Ts'o cpu_to_le64(EXT4_SB(sb)->s_kbytes_written); 452057042651STheodore Ts'o ext4_free_blocks_count_set(es, 452157042651STheodore Ts'o EXT4_C2B(EXT4_SB(sb), percpu_counter_sum_positive( 452257042651STheodore Ts'o &EXT4_SB(sb)->s_freeclusters_counter))); 45237f93cff9STheodore Ts'o es->s_free_inodes_count = 45247f93cff9STheodore Ts'o cpu_to_le32(percpu_counter_sum_positive( 45255d1b1b3fSAneesh Kumar K.V &EXT4_SB(sb)->s_freeinodes_counter)); 4526ac27a0ecSDave Kleikamp BUFFER_TRACE(sbh, "marking dirty"); 452706db49e6STheodore Ts'o ext4_superblock_csum_set(sb); 4528ac27a0ecSDave Kleikamp mark_buffer_dirty(sbh); 4529914258bfSTheodore Ts'o if (sync) { 4530c4be0c1dSTakashi Sato error = sync_dirty_buffer(sbh); 4531c4be0c1dSTakashi Sato if (error) 4532c4be0c1dSTakashi Sato return error; 4533c4be0c1dSTakashi Sato 4534c4be0c1dSTakashi Sato error = buffer_write_io_error(sbh); 4535c4be0c1dSTakashi Sato if (error) { 4536b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, "I/O error while writing " 4537b31e1552SEric Sandeen "superblock"); 4538914258bfSTheodore Ts'o clear_buffer_write_io_error(sbh); 4539914258bfSTheodore Ts'o set_buffer_uptodate(sbh); 4540914258bfSTheodore Ts'o } 4541914258bfSTheodore Ts'o } 4542c4be0c1dSTakashi Sato return error; 4543ac27a0ecSDave Kleikamp } 4544ac27a0ecSDave Kleikamp 4545ac27a0ecSDave Kleikamp /* 4546ac27a0ecSDave Kleikamp * Have we just finished recovery? If so, and if we are mounting (or 4547ac27a0ecSDave Kleikamp * remounting) the filesystem readonly, then we will end up with a 4548ac27a0ecSDave Kleikamp * consistent fs on disk. Record that fact. 4549ac27a0ecSDave Kleikamp */ 4550617ba13bSMingming Cao static void ext4_mark_recovery_complete(struct super_block *sb, 4551617ba13bSMingming Cao struct ext4_super_block *es) 4552ac27a0ecSDave Kleikamp { 4553617ba13bSMingming Cao journal_t *journal = EXT4_SB(sb)->s_journal; 4554ac27a0ecSDave Kleikamp 45550390131bSFrank Mayhar if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) { 45560390131bSFrank Mayhar BUG_ON(journal != NULL); 45570390131bSFrank Mayhar return; 45580390131bSFrank Mayhar } 4559dab291afSMingming Cao jbd2_journal_lock_updates(journal); 45607ffe1ea8SHidehiro Kawai if (jbd2_journal_flush(journal) < 0) 45617ffe1ea8SHidehiro Kawai goto out; 45627ffe1ea8SHidehiro Kawai 4563617ba13bSMingming Cao if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER) && 4564ac27a0ecSDave Kleikamp sb->s_flags & MS_RDONLY) { 4565617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4566e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4567ac27a0ecSDave Kleikamp } 45687ffe1ea8SHidehiro Kawai 45697ffe1ea8SHidehiro Kawai out: 4570dab291afSMingming Cao jbd2_journal_unlock_updates(journal); 4571ac27a0ecSDave Kleikamp } 4572ac27a0ecSDave Kleikamp 4573ac27a0ecSDave Kleikamp /* 4574ac27a0ecSDave Kleikamp * If we are mounting (or read-write remounting) a filesystem whose journal 4575ac27a0ecSDave Kleikamp * has recorded an error from a previous lifetime, move that error to the 4576ac27a0ecSDave Kleikamp * main filesystem now. 4577ac27a0ecSDave Kleikamp */ 4578617ba13bSMingming Cao static void ext4_clear_journal_err(struct super_block *sb, 4579617ba13bSMingming Cao struct ext4_super_block *es) 4580ac27a0ecSDave Kleikamp { 4581ac27a0ecSDave Kleikamp journal_t *journal; 4582ac27a0ecSDave Kleikamp int j_errno; 4583ac27a0ecSDave Kleikamp const char *errstr; 4584ac27a0ecSDave Kleikamp 45850390131bSFrank Mayhar BUG_ON(!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)); 45860390131bSFrank Mayhar 4587617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4588ac27a0ecSDave Kleikamp 4589ac27a0ecSDave Kleikamp /* 4590ac27a0ecSDave Kleikamp * Now check for any error status which may have been recorded in the 4591617ba13bSMingming Cao * journal by a prior ext4_error() or ext4_abort() 4592ac27a0ecSDave Kleikamp */ 4593ac27a0ecSDave Kleikamp 4594dab291afSMingming Cao j_errno = jbd2_journal_errno(journal); 4595ac27a0ecSDave Kleikamp if (j_errno) { 4596ac27a0ecSDave Kleikamp char nbuf[16]; 4597ac27a0ecSDave Kleikamp 4598617ba13bSMingming Cao errstr = ext4_decode_error(sb, j_errno, nbuf); 459912062dddSEric Sandeen ext4_warning(sb, "Filesystem error recorded " 4600ac27a0ecSDave Kleikamp "from previous mount: %s", errstr); 460112062dddSEric Sandeen ext4_warning(sb, "Marking fs in need of filesystem check."); 4602ac27a0ecSDave Kleikamp 4603617ba13bSMingming Cao EXT4_SB(sb)->s_mount_state |= EXT4_ERROR_FS; 4604617ba13bSMingming Cao es->s_state |= cpu_to_le16(EXT4_ERROR_FS); 4605e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4606ac27a0ecSDave Kleikamp 4607dab291afSMingming Cao jbd2_journal_clear_err(journal); 4608d796c52eSTheodore Ts'o jbd2_journal_update_sb_errno(journal); 4609ac27a0ecSDave Kleikamp } 4610ac27a0ecSDave Kleikamp } 4611ac27a0ecSDave Kleikamp 4612ac27a0ecSDave Kleikamp /* 4613ac27a0ecSDave Kleikamp * Force the running and committing transactions to commit, 4614ac27a0ecSDave Kleikamp * and wait on the commit. 4615ac27a0ecSDave Kleikamp */ 4616617ba13bSMingming Cao int ext4_force_commit(struct super_block *sb) 4617ac27a0ecSDave Kleikamp { 4618ac27a0ecSDave Kleikamp journal_t *journal; 4619ac27a0ecSDave Kleikamp 4620ac27a0ecSDave Kleikamp if (sb->s_flags & MS_RDONLY) 4621ac27a0ecSDave Kleikamp return 0; 4622ac27a0ecSDave Kleikamp 4623617ba13bSMingming Cao journal = EXT4_SB(sb)->s_journal; 4624b1deefc9SGuo Chao return ext4_journal_force_commit(journal); 4625ac27a0ecSDave Kleikamp } 4626ac27a0ecSDave Kleikamp 4627617ba13bSMingming Cao static int ext4_sync_fs(struct super_block *sb, int wait) 4628ac27a0ecSDave Kleikamp { 462914ce0cb4STheodore Ts'o int ret = 0; 46309eddacf9SJan Kara tid_t target; 463106a407f1SDmitry Monakhov bool needs_barrier = false; 46328d5d02e6SMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4633ac27a0ecSDave Kleikamp 46349bffad1eSTheodore Ts'o trace_ext4_sync_fs(sb, wait); 46352e8fa54eSJan Kara flush_workqueue(sbi->rsv_conversion_wq); 4636a1177825SJan Kara /* 4637a1177825SJan Kara * Writeback quota in non-journalled quota case - journalled quota has 4638a1177825SJan Kara * no dirty dquots 4639a1177825SJan Kara */ 4640a1177825SJan Kara dquot_writeback_dquots(sb, -1); 464106a407f1SDmitry Monakhov /* 464206a407f1SDmitry Monakhov * Data writeback is possible w/o journal transaction, so barrier must 464306a407f1SDmitry Monakhov * being sent at the end of the function. But we can skip it if 464406a407f1SDmitry Monakhov * transaction_commit will do it for us. 464506a407f1SDmitry Monakhov */ 464606a407f1SDmitry Monakhov target = jbd2_get_latest_transaction(sbi->s_journal); 464706a407f1SDmitry Monakhov if (wait && sbi->s_journal->j_flags & JBD2_BARRIER && 464806a407f1SDmitry Monakhov !jbd2_trans_will_send_data_barrier(sbi->s_journal, target)) 464906a407f1SDmitry Monakhov needs_barrier = true; 465006a407f1SDmitry Monakhov 46518d5d02e6SMingming Cao if (jbd2_journal_start_commit(sbi->s_journal, &target)) { 4652ac27a0ecSDave Kleikamp if (wait) 465306a407f1SDmitry Monakhov ret = jbd2_log_wait_commit(sbi->s_journal, target); 46540390131bSFrank Mayhar } 465506a407f1SDmitry Monakhov if (needs_barrier) { 465606a407f1SDmitry Monakhov int err; 465706a407f1SDmitry Monakhov err = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 465806a407f1SDmitry Monakhov if (!ret) 465906a407f1SDmitry Monakhov ret = err; 466006a407f1SDmitry Monakhov } 466106a407f1SDmitry Monakhov 466206a407f1SDmitry Monakhov return ret; 466306a407f1SDmitry Monakhov } 466406a407f1SDmitry Monakhov 466506a407f1SDmitry Monakhov static int ext4_sync_fs_nojournal(struct super_block *sb, int wait) 466606a407f1SDmitry Monakhov { 466706a407f1SDmitry Monakhov int ret = 0; 466806a407f1SDmitry Monakhov 466906a407f1SDmitry Monakhov trace_ext4_sync_fs(sb, wait); 467006a407f1SDmitry Monakhov flush_workqueue(EXT4_SB(sb)->rsv_conversion_wq); 467106a407f1SDmitry Monakhov dquot_writeback_dquots(sb, -1); 467206a407f1SDmitry Monakhov if (wait && test_opt(sb, BARRIER)) 467306a407f1SDmitry Monakhov ret = blkdev_issue_flush(sb->s_bdev, GFP_KERNEL, NULL); 467406a407f1SDmitry Monakhov 467514ce0cb4STheodore Ts'o return ret; 4676ac27a0ecSDave Kleikamp } 4677ac27a0ecSDave Kleikamp 4678ac27a0ecSDave Kleikamp /* 4679ac27a0ecSDave Kleikamp * LVM calls this function before a (read-only) snapshot is created. This 4680ac27a0ecSDave Kleikamp * gives us a chance to flush the journal completely and mark the fs clean. 4681be4f27d3SYongqiang Yang * 4682be4f27d3SYongqiang Yang * Note that only this function cannot bring a filesystem to be in a clean 46838e8ad8a5SJan Kara * state independently. It relies on upper layer to stop all data & metadata 46848e8ad8a5SJan Kara * modifications. 4685ac27a0ecSDave Kleikamp */ 4686c4be0c1dSTakashi Sato static int ext4_freeze(struct super_block *sb) 4687ac27a0ecSDave Kleikamp { 4688c4be0c1dSTakashi Sato int error = 0; 4689c4be0c1dSTakashi Sato journal_t *journal; 4690ac27a0ecSDave Kleikamp 46919ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 46929ca92389STheodore Ts'o return 0; 46939ca92389STheodore Ts'o 4694c4be0c1dSTakashi Sato journal = EXT4_SB(sb)->s_journal; 4695ac27a0ecSDave Kleikamp 4696ac27a0ecSDave Kleikamp /* Now we set up the journal barrier. */ 4697dab291afSMingming Cao jbd2_journal_lock_updates(journal); 46987ffe1ea8SHidehiro Kawai 46997ffe1ea8SHidehiro Kawai /* 47009ca92389STheodore Ts'o * Don't clear the needs_recovery flag if we failed to flush 47019ca92389STheodore Ts'o * the journal. 47027ffe1ea8SHidehiro Kawai */ 4703c4be0c1dSTakashi Sato error = jbd2_journal_flush(journal); 47046b0310fbSEric Sandeen if (error < 0) 47056b0310fbSEric Sandeen goto out; 4706ac27a0ecSDave Kleikamp 4707ac27a0ecSDave Kleikamp /* Journal blocked and flushed, clear needs_recovery flag. */ 4708617ba13bSMingming Cao EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4709e2d67052STheodore Ts'o error = ext4_commit_super(sb, 1); 47106b0310fbSEric Sandeen out: 47118e8ad8a5SJan Kara /* we rely on upper layer to stop further updates */ 47126b0310fbSEric Sandeen jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 47136b0310fbSEric Sandeen return error; 4714ac27a0ecSDave Kleikamp } 4715ac27a0ecSDave Kleikamp 4716ac27a0ecSDave Kleikamp /* 4717ac27a0ecSDave Kleikamp * Called by LVM after the snapshot is done. We need to reset the RECOVER 4718ac27a0ecSDave Kleikamp * flag here, even though the filesystem is not technically dirty yet. 4719ac27a0ecSDave Kleikamp */ 4720c4be0c1dSTakashi Sato static int ext4_unfreeze(struct super_block *sb) 4721ac27a0ecSDave Kleikamp { 47229ca92389STheodore Ts'o if (sb->s_flags & MS_RDONLY) 47239ca92389STheodore Ts'o return 0; 47249ca92389STheodore Ts'o 47259ca92389STheodore Ts'o /* Reset the needs_recovery flag before the fs is unlocked. */ 4726617ba13bSMingming Cao EXT4_SET_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER); 4727e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 4728c4be0c1dSTakashi Sato return 0; 4729ac27a0ecSDave Kleikamp } 4730ac27a0ecSDave Kleikamp 4731673c6100STheodore Ts'o /* 4732673c6100STheodore Ts'o * Structure to save mount options for ext4_remount's benefit 4733673c6100STheodore Ts'o */ 4734673c6100STheodore Ts'o struct ext4_mount_options { 4735673c6100STheodore Ts'o unsigned long s_mount_opt; 4736a2595b8aSTheodore Ts'o unsigned long s_mount_opt2; 473708cefc7aSEric W. Biederman kuid_t s_resuid; 473808cefc7aSEric W. Biederman kgid_t s_resgid; 4739673c6100STheodore Ts'o unsigned long s_commit_interval; 4740673c6100STheodore Ts'o u32 s_min_batch_time, s_max_batch_time; 4741673c6100STheodore Ts'o #ifdef CONFIG_QUOTA 4742673c6100STheodore Ts'o int s_jquota_fmt; 4743673c6100STheodore Ts'o char *s_qf_names[MAXQUOTAS]; 4744673c6100STheodore Ts'o #endif 4745673c6100STheodore Ts'o }; 4746673c6100STheodore Ts'o 4747617ba13bSMingming Cao static int ext4_remount(struct super_block *sb, int *flags, char *data) 4748ac27a0ecSDave Kleikamp { 4749617ba13bSMingming Cao struct ext4_super_block *es; 4750617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4751ac27a0ecSDave Kleikamp unsigned long old_sb_flags; 4752617ba13bSMingming Cao struct ext4_mount_options old_opts; 4753c79d967dSChristoph Hellwig int enable_quota = 0; 47548a266467STheodore Ts'o ext4_group_t g; 4755b3881f74STheodore Ts'o unsigned int journal_ioprio = DEFAULT_JOURNAL_IOPRIO; 4756c5e06d10SJohann Lombardi int err = 0; 4757ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 475803dafb5fSChen Gang int i, j; 4759ac27a0ecSDave Kleikamp #endif 4760d4c402d9SCurt Wohlgemuth char *orig_data = kstrdup(data, GFP_KERNEL); 4761ac27a0ecSDave Kleikamp 4762ac27a0ecSDave Kleikamp /* Store the original options */ 4763ac27a0ecSDave Kleikamp old_sb_flags = sb->s_flags; 4764ac27a0ecSDave Kleikamp old_opts.s_mount_opt = sbi->s_mount_opt; 4765a2595b8aSTheodore Ts'o old_opts.s_mount_opt2 = sbi->s_mount_opt2; 4766ac27a0ecSDave Kleikamp old_opts.s_resuid = sbi->s_resuid; 4767ac27a0ecSDave Kleikamp old_opts.s_resgid = sbi->s_resgid; 4768ac27a0ecSDave Kleikamp old_opts.s_commit_interval = sbi->s_commit_interval; 476930773840STheodore Ts'o old_opts.s_min_batch_time = sbi->s_min_batch_time; 477030773840STheodore Ts'o old_opts.s_max_batch_time = sbi->s_max_batch_time; 4771ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4772ac27a0ecSDave Kleikamp old_opts.s_jquota_fmt = sbi->s_jquota_fmt; 4773ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 477403dafb5fSChen Gang if (sbi->s_qf_names[i]) { 477503dafb5fSChen Gang old_opts.s_qf_names[i] = kstrdup(sbi->s_qf_names[i], 477603dafb5fSChen Gang GFP_KERNEL); 477703dafb5fSChen Gang if (!old_opts.s_qf_names[i]) { 477803dafb5fSChen Gang for (j = 0; j < i; j++) 477903dafb5fSChen Gang kfree(old_opts.s_qf_names[j]); 47803e36a163SWei Yongjun kfree(orig_data); 478103dafb5fSChen Gang return -ENOMEM; 478203dafb5fSChen Gang } 478303dafb5fSChen Gang } else 478403dafb5fSChen Gang old_opts.s_qf_names[i] = NULL; 4785ac27a0ecSDave Kleikamp #endif 4786b3881f74STheodore Ts'o if (sbi->s_journal && sbi->s_journal->j_task->io_context) 4787b3881f74STheodore Ts'o journal_ioprio = sbi->s_journal->j_task->io_context->ioprio; 4788ac27a0ecSDave Kleikamp 4789ac27a0ecSDave Kleikamp /* 4790ac27a0ecSDave Kleikamp * Allow the "check" option to be passed as a remount option. 4791ac27a0ecSDave Kleikamp */ 4792661aa520SEric Sandeen if (!parse_options(data, sb, NULL, &journal_ioprio, 1)) { 4793ac27a0ecSDave Kleikamp err = -EINVAL; 4794ac27a0ecSDave Kleikamp goto restore_opts; 4795ac27a0ecSDave Kleikamp } 4796ac27a0ecSDave Kleikamp 47976ae6514bSPiotr Sarna if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) { 47986ae6514bSPiotr Sarna if (test_opt2(sb, EXPLICIT_DELALLOC)) { 47996ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48006ae6514bSPiotr Sarna "both data=journal and delalloc"); 48016ae6514bSPiotr Sarna err = -EINVAL; 48026ae6514bSPiotr Sarna goto restore_opts; 48036ae6514bSPiotr Sarna } 48046ae6514bSPiotr Sarna if (test_opt(sb, DIOREAD_NOLOCK)) { 48056ae6514bSPiotr Sarna ext4_msg(sb, KERN_ERR, "can't mount with " 48066ae6514bSPiotr Sarna "both data=journal and dioread_nolock"); 48076ae6514bSPiotr Sarna err = -EINVAL; 48086ae6514bSPiotr Sarna goto restore_opts; 48096ae6514bSPiotr Sarna } 48106ae6514bSPiotr Sarna } 48116ae6514bSPiotr Sarna 48124ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) 4813c67d859eSTheodore Ts'o ext4_abort(sb, "Abort forced by user"); 4814ac27a0ecSDave Kleikamp 4815ac27a0ecSDave Kleikamp sb->s_flags = (sb->s_flags & ~MS_POSIXACL) | 4816482a7425SDmitry Monakhov (test_opt(sb, POSIX_ACL) ? MS_POSIXACL : 0); 4817ac27a0ecSDave Kleikamp 4818ac27a0ecSDave Kleikamp es = sbi->s_es; 4819ac27a0ecSDave Kleikamp 4820b3881f74STheodore Ts'o if (sbi->s_journal) { 4821617ba13bSMingming Cao ext4_init_journal_params(sb, sbi->s_journal); 4822b3881f74STheodore Ts'o set_task_ioprio(sbi->s_journal->j_task, journal_ioprio); 4823b3881f74STheodore Ts'o } 4824ac27a0ecSDave Kleikamp 4825661aa520SEric Sandeen if ((*flags & MS_RDONLY) != (sb->s_flags & MS_RDONLY)) { 48264ab2f15bSTheodore Ts'o if (sbi->s_mount_flags & EXT4_MF_FS_ABORTED) { 4827ac27a0ecSDave Kleikamp err = -EROFS; 4828ac27a0ecSDave Kleikamp goto restore_opts; 4829ac27a0ecSDave Kleikamp } 4830ac27a0ecSDave Kleikamp 4831ac27a0ecSDave Kleikamp if (*flags & MS_RDONLY) { 48320f0dd62fSChristoph Hellwig err = dquot_suspend(sb, -1); 48330f0dd62fSChristoph Hellwig if (err < 0) 4834c79d967dSChristoph Hellwig goto restore_opts; 4835c79d967dSChristoph Hellwig 4836ac27a0ecSDave Kleikamp /* 4837ac27a0ecSDave Kleikamp * First of all, the unconditional stuff we have to do 4838ac27a0ecSDave Kleikamp * to disable replay of the journal when we next remount 4839ac27a0ecSDave Kleikamp */ 4840ac27a0ecSDave Kleikamp sb->s_flags |= MS_RDONLY; 4841ac27a0ecSDave Kleikamp 4842ac27a0ecSDave Kleikamp /* 4843ac27a0ecSDave Kleikamp * OK, test if we are remounting a valid rw partition 4844ac27a0ecSDave Kleikamp * readonly, and if so set the rdonly flag and then 4845ac27a0ecSDave Kleikamp * mark the partition as valid again. 4846ac27a0ecSDave Kleikamp */ 4847617ba13bSMingming Cao if (!(es->s_state & cpu_to_le16(EXT4_VALID_FS)) && 4848617ba13bSMingming Cao (sbi->s_mount_state & EXT4_VALID_FS)) 4849ac27a0ecSDave Kleikamp es->s_state = cpu_to_le16(sbi->s_mount_state); 4850ac27a0ecSDave Kleikamp 4851a63c9eb2STheodore Ts'o if (sbi->s_journal) 4852617ba13bSMingming Cao ext4_mark_recovery_complete(sb, es); 4853ac27a0ecSDave Kleikamp } else { 4854a13fb1a4SEric Sandeen /* Make sure we can mount this feature set readwrite */ 4855a13fb1a4SEric Sandeen if (!ext4_feature_set_ok(sb, 0)) { 4856ac27a0ecSDave Kleikamp err = -EROFS; 4857ac27a0ecSDave Kleikamp goto restore_opts; 4858ac27a0ecSDave Kleikamp } 4859ead6596bSEric Sandeen /* 48608a266467STheodore Ts'o * Make sure the group descriptor checksums 48610b8e58a1SAndreas Dilger * are sane. If they aren't, refuse to remount r/w. 48628a266467STheodore Ts'o */ 48638a266467STheodore Ts'o for (g = 0; g < sbi->s_groups_count; g++) { 48648a266467STheodore Ts'o struct ext4_group_desc *gdp = 48658a266467STheodore Ts'o ext4_get_group_desc(sb, g, NULL); 48668a266467STheodore Ts'o 4867feb0ab32SDarrick J. Wong if (!ext4_group_desc_csum_verify(sb, g, gdp)) { 4868b31e1552SEric Sandeen ext4_msg(sb, KERN_ERR, 4869b31e1552SEric Sandeen "ext4_remount: Checksum for group %u failed (%u!=%u)", 48708a266467STheodore Ts'o g, le16_to_cpu(ext4_group_desc_csum(sbi, g, gdp)), 48718a266467STheodore Ts'o le16_to_cpu(gdp->bg_checksum)); 48728a266467STheodore Ts'o err = -EINVAL; 48738a266467STheodore Ts'o goto restore_opts; 48748a266467STheodore Ts'o } 48758a266467STheodore Ts'o } 48768a266467STheodore Ts'o 48778a266467STheodore Ts'o /* 4878ead6596bSEric Sandeen * If we have an unprocessed orphan list hanging 4879ead6596bSEric Sandeen * around from a previously readonly bdev mount, 4880ead6596bSEric Sandeen * require a full umount/remount for now. 4881ead6596bSEric Sandeen */ 4882ead6596bSEric Sandeen if (es->s_last_orphan) { 4883b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Couldn't " 4884ead6596bSEric Sandeen "remount RDWR because of unprocessed " 4885ead6596bSEric Sandeen "orphan inode list. Please " 4886b31e1552SEric Sandeen "umount/remount instead"); 4887ead6596bSEric Sandeen err = -EINVAL; 4888ead6596bSEric Sandeen goto restore_opts; 4889ead6596bSEric Sandeen } 4890ead6596bSEric Sandeen 4891ac27a0ecSDave Kleikamp /* 4892ac27a0ecSDave Kleikamp * Mounting a RDONLY partition read-write, so reread 4893ac27a0ecSDave Kleikamp * and store the current valid flag. (It may have 4894ac27a0ecSDave Kleikamp * been changed by e2fsck since we originally mounted 4895ac27a0ecSDave Kleikamp * the partition.) 4896ac27a0ecSDave Kleikamp */ 48970390131bSFrank Mayhar if (sbi->s_journal) 4898617ba13bSMingming Cao ext4_clear_journal_err(sb, es); 4899ac27a0ecSDave Kleikamp sbi->s_mount_state = le16_to_cpu(es->s_state); 4900617ba13bSMingming Cao if (!ext4_setup_super(sb, es, 0)) 4901ac27a0ecSDave Kleikamp sb->s_flags &= ~MS_RDONLY; 4902c5e06d10SJohann Lombardi if (EXT4_HAS_INCOMPAT_FEATURE(sb, 4903c5e06d10SJohann Lombardi EXT4_FEATURE_INCOMPAT_MMP)) 4904c5e06d10SJohann Lombardi if (ext4_multi_mount_protect(sb, 4905c5e06d10SJohann Lombardi le64_to_cpu(es->s_mmp_block))) { 4906c5e06d10SJohann Lombardi err = -EROFS; 4907c5e06d10SJohann Lombardi goto restore_opts; 4908c5e06d10SJohann Lombardi } 4909c79d967dSChristoph Hellwig enable_quota = 1; 4910ac27a0ecSDave Kleikamp } 4911ac27a0ecSDave Kleikamp } 4912bfff6873SLukas Czerner 4913bfff6873SLukas Czerner /* 4914bfff6873SLukas Czerner * Reinitialize lazy itable initialization thread based on 4915bfff6873SLukas Czerner * current settings 4916bfff6873SLukas Czerner */ 4917bfff6873SLukas Czerner if ((sb->s_flags & MS_RDONLY) || !test_opt(sb, INIT_INODE_TABLE)) 4918bfff6873SLukas Czerner ext4_unregister_li_request(sb); 4919bfff6873SLukas Czerner else { 4920bfff6873SLukas Czerner ext4_group_t first_not_zeroed; 4921bfff6873SLukas Czerner first_not_zeroed = ext4_has_uninit_itable(sb); 4922bfff6873SLukas Czerner ext4_register_li_request(sb, first_not_zeroed); 4923bfff6873SLukas Czerner } 4924bfff6873SLukas Czerner 49256fd058f7STheodore Ts'o ext4_setup_system_zone(sb); 4926d096ad0fSMichael Tokarev if (sbi->s_journal == NULL && !(old_sb_flags & MS_RDONLY)) 4927e2d67052STheodore Ts'o ext4_commit_super(sb, 1); 49280390131bSFrank Mayhar 4929ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4930ac27a0ecSDave Kleikamp /* Release old quota file names */ 4931ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) 4932ac27a0ecSDave Kleikamp kfree(old_opts.s_qf_names[i]); 49337c319d32SAditya Kali if (enable_quota) { 49347c319d32SAditya Kali if (sb_any_quota_suspended(sb)) 49350f0dd62fSChristoph Hellwig dquot_resume(sb, -1); 49367c319d32SAditya Kali else if (EXT4_HAS_RO_COMPAT_FEATURE(sb, 49377c319d32SAditya Kali EXT4_FEATURE_RO_COMPAT_QUOTA)) { 49387c319d32SAditya Kali err = ext4_enable_quotas(sb); 493907724f98STheodore Ts'o if (err) 49407c319d32SAditya Kali goto restore_opts; 49417c319d32SAditya Kali } 49427c319d32SAditya Kali } 49437c319d32SAditya Kali #endif 4944d4c402d9SCurt Wohlgemuth 4945d4c402d9SCurt Wohlgemuth ext4_msg(sb, KERN_INFO, "re-mounted. Opts: %s", orig_data); 4946d4c402d9SCurt Wohlgemuth kfree(orig_data); 4947ac27a0ecSDave Kleikamp return 0; 49480b8e58a1SAndreas Dilger 4949ac27a0ecSDave Kleikamp restore_opts: 4950ac27a0ecSDave Kleikamp sb->s_flags = old_sb_flags; 4951ac27a0ecSDave Kleikamp sbi->s_mount_opt = old_opts.s_mount_opt; 4952a2595b8aSTheodore Ts'o sbi->s_mount_opt2 = old_opts.s_mount_opt2; 4953ac27a0ecSDave Kleikamp sbi->s_resuid = old_opts.s_resuid; 4954ac27a0ecSDave Kleikamp sbi->s_resgid = old_opts.s_resgid; 4955ac27a0ecSDave Kleikamp sbi->s_commit_interval = old_opts.s_commit_interval; 495630773840STheodore Ts'o sbi->s_min_batch_time = old_opts.s_min_batch_time; 495730773840STheodore Ts'o sbi->s_max_batch_time = old_opts.s_max_batch_time; 4958ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 4959ac27a0ecSDave Kleikamp sbi->s_jquota_fmt = old_opts.s_jquota_fmt; 4960ac27a0ecSDave Kleikamp for (i = 0; i < MAXQUOTAS; i++) { 4961ac27a0ecSDave Kleikamp kfree(sbi->s_qf_names[i]); 4962ac27a0ecSDave Kleikamp sbi->s_qf_names[i] = old_opts.s_qf_names[i]; 4963ac27a0ecSDave Kleikamp } 4964ac27a0ecSDave Kleikamp #endif 4965d4c402d9SCurt Wohlgemuth kfree(orig_data); 4966ac27a0ecSDave Kleikamp return err; 4967ac27a0ecSDave Kleikamp } 4968ac27a0ecSDave Kleikamp 4969617ba13bSMingming Cao static int ext4_statfs(struct dentry *dentry, struct kstatfs *buf) 4970ac27a0ecSDave Kleikamp { 4971ac27a0ecSDave Kleikamp struct super_block *sb = dentry->d_sb; 4972617ba13bSMingming Cao struct ext4_sb_info *sbi = EXT4_SB(sb); 4973617ba13bSMingming Cao struct ext4_super_block *es = sbi->s_es; 497427dd4385SLukas Czerner ext4_fsblk_t overhead = 0, resv_blocks; 4975960cc398SPekka Enberg u64 fsid; 4976d02a9391SKazuya Mio s64 bfree; 497727dd4385SLukas Czerner resv_blocks = EXT4_C2B(sbi, atomic64_read(&sbi->s_resv_clusters)); 4978ac27a0ecSDave Kleikamp 4979952fc18eSTheodore Ts'o if (!test_opt(sb, MINIX_DF)) 4980952fc18eSTheodore Ts'o overhead = sbi->s_overhead; 4981ac27a0ecSDave Kleikamp 4982617ba13bSMingming Cao buf->f_type = EXT4_SUPER_MAGIC; 4983ac27a0ecSDave Kleikamp buf->f_bsize = sb->s_blocksize; 4984b72f78cbSEric Sandeen buf->f_blocks = ext4_blocks_count(es) - EXT4_C2B(sbi, overhead); 498557042651STheodore Ts'o bfree = percpu_counter_sum_positive(&sbi->s_freeclusters_counter) - 498657042651STheodore Ts'o percpu_counter_sum_positive(&sbi->s_dirtyclusters_counter); 4987d02a9391SKazuya Mio /* prevent underflow in case that few free space is available */ 498857042651STheodore Ts'o buf->f_bfree = EXT4_C2B(sbi, max_t(s64, bfree, 0)); 498927dd4385SLukas Czerner buf->f_bavail = buf->f_bfree - 499027dd4385SLukas Czerner (ext4_r_blocks_count(es) + resv_blocks); 499127dd4385SLukas Czerner if (buf->f_bfree < (ext4_r_blocks_count(es) + resv_blocks)) 4992ac27a0ecSDave Kleikamp buf->f_bavail = 0; 4993ac27a0ecSDave Kleikamp buf->f_files = le32_to_cpu(es->s_inodes_count); 499452d9f3b4SPeter Zijlstra buf->f_ffree = percpu_counter_sum_positive(&sbi->s_freeinodes_counter); 4995617ba13bSMingming Cao buf->f_namelen = EXT4_NAME_LEN; 4996960cc398SPekka Enberg fsid = le64_to_cpup((void *)es->s_uuid) ^ 4997960cc398SPekka Enberg le64_to_cpup((void *)es->s_uuid + sizeof(u64)); 4998960cc398SPekka Enberg buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL; 4999960cc398SPekka Enberg buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL; 50000b8e58a1SAndreas Dilger 5001ac27a0ecSDave Kleikamp return 0; 5002ac27a0ecSDave Kleikamp } 5003ac27a0ecSDave Kleikamp 50040b8e58a1SAndreas Dilger /* Helper function for writing quotas on sync - we need to start transaction 50050b8e58a1SAndreas Dilger * before quota file is locked for write. Otherwise the are possible deadlocks: 5006ac27a0ecSDave Kleikamp * Process 1 Process 2 5007617ba13bSMingming Cao * ext4_create() quota_sync() 5008dab291afSMingming Cao * jbd2_journal_start() write_dquot() 5009871a2931SChristoph Hellwig * dquot_initialize() down(dqio_mutex) 5010dab291afSMingming Cao * down(dqio_mutex) jbd2_journal_start() 5011ac27a0ecSDave Kleikamp * 5012ac27a0ecSDave Kleikamp */ 5013ac27a0ecSDave Kleikamp 5014ac27a0ecSDave Kleikamp #ifdef CONFIG_QUOTA 5015ac27a0ecSDave Kleikamp 5016ac27a0ecSDave Kleikamp static inline struct inode *dquot_to_inode(struct dquot *dquot) 5017ac27a0ecSDave Kleikamp { 50184c376dcaSEric W. Biederman return sb_dqopt(dquot->dq_sb)->files[dquot->dq_id.type]; 5019ac27a0ecSDave Kleikamp } 5020ac27a0ecSDave Kleikamp 5021617ba13bSMingming Cao static int ext4_write_dquot(struct dquot *dquot) 5022ac27a0ecSDave Kleikamp { 5023ac27a0ecSDave Kleikamp int ret, err; 5024ac27a0ecSDave Kleikamp handle_t *handle; 5025ac27a0ecSDave Kleikamp struct inode *inode; 5026ac27a0ecSDave Kleikamp 5027ac27a0ecSDave Kleikamp inode = dquot_to_inode(dquot); 50289924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 5029617ba13bSMingming Cao EXT4_QUOTA_TRANS_BLOCKS(dquot->dq_sb)); 5030ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5031ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5032ac27a0ecSDave Kleikamp ret = dquot_commit(dquot); 5033617ba13bSMingming Cao err = ext4_journal_stop(handle); 5034ac27a0ecSDave Kleikamp if (!ret) 5035ac27a0ecSDave Kleikamp ret = err; 5036ac27a0ecSDave Kleikamp return ret; 5037ac27a0ecSDave Kleikamp } 5038ac27a0ecSDave Kleikamp 5039617ba13bSMingming Cao static int ext4_acquire_dquot(struct dquot *dquot) 5040ac27a0ecSDave Kleikamp { 5041ac27a0ecSDave Kleikamp int ret, err; 5042ac27a0ecSDave Kleikamp handle_t *handle; 5043ac27a0ecSDave Kleikamp 50449924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5045617ba13bSMingming Cao EXT4_QUOTA_INIT_BLOCKS(dquot->dq_sb)); 5046ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5047ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5048ac27a0ecSDave Kleikamp ret = dquot_acquire(dquot); 5049617ba13bSMingming Cao err = ext4_journal_stop(handle); 5050ac27a0ecSDave Kleikamp if (!ret) 5051ac27a0ecSDave Kleikamp ret = err; 5052ac27a0ecSDave Kleikamp return ret; 5053ac27a0ecSDave Kleikamp } 5054ac27a0ecSDave Kleikamp 5055617ba13bSMingming Cao static int ext4_release_dquot(struct dquot *dquot) 5056ac27a0ecSDave Kleikamp { 5057ac27a0ecSDave Kleikamp int ret, err; 5058ac27a0ecSDave Kleikamp handle_t *handle; 5059ac27a0ecSDave Kleikamp 50609924a92aSTheodore Ts'o handle = ext4_journal_start(dquot_to_inode(dquot), EXT4_HT_QUOTA, 5061617ba13bSMingming Cao EXT4_QUOTA_DEL_BLOCKS(dquot->dq_sb)); 50629c3013e9SJan Kara if (IS_ERR(handle)) { 50639c3013e9SJan Kara /* Release dquot anyway to avoid endless cycle in dqput() */ 50649c3013e9SJan Kara dquot_release(dquot); 5065ac27a0ecSDave Kleikamp return PTR_ERR(handle); 50669c3013e9SJan Kara } 5067ac27a0ecSDave Kleikamp ret = dquot_release(dquot); 5068617ba13bSMingming Cao err = ext4_journal_stop(handle); 5069ac27a0ecSDave Kleikamp if (!ret) 5070ac27a0ecSDave Kleikamp ret = err; 5071ac27a0ecSDave Kleikamp return ret; 5072ac27a0ecSDave Kleikamp } 5073ac27a0ecSDave Kleikamp 5074617ba13bSMingming Cao static int ext4_mark_dquot_dirty(struct dquot *dquot) 5075ac27a0ecSDave Kleikamp { 5076262b4662SJan Kara struct super_block *sb = dquot->dq_sb; 5077262b4662SJan Kara struct ext4_sb_info *sbi = EXT4_SB(sb); 5078262b4662SJan Kara 50792c8be6b2SJan Kara /* Are we journaling quotas? */ 5080262b4662SJan Kara if (EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA) || 5081262b4662SJan Kara sbi->s_qf_names[USRQUOTA] || sbi->s_qf_names[GRPQUOTA]) { 5082ac27a0ecSDave Kleikamp dquot_mark_dquot_dirty(dquot); 5083617ba13bSMingming Cao return ext4_write_dquot(dquot); 5084ac27a0ecSDave Kleikamp } else { 5085ac27a0ecSDave Kleikamp return dquot_mark_dquot_dirty(dquot); 5086ac27a0ecSDave Kleikamp } 5087ac27a0ecSDave Kleikamp } 5088ac27a0ecSDave Kleikamp 5089617ba13bSMingming Cao static int ext4_write_info(struct super_block *sb, int type) 5090ac27a0ecSDave Kleikamp { 5091ac27a0ecSDave Kleikamp int ret, err; 5092ac27a0ecSDave Kleikamp handle_t *handle; 5093ac27a0ecSDave Kleikamp 5094ac27a0ecSDave Kleikamp /* Data block + inode block */ 50959924a92aSTheodore Ts'o handle = ext4_journal_start(sb->s_root->d_inode, EXT4_HT_QUOTA, 2); 5096ac27a0ecSDave Kleikamp if (IS_ERR(handle)) 5097ac27a0ecSDave Kleikamp return PTR_ERR(handle); 5098ac27a0ecSDave Kleikamp ret = dquot_commit_info(sb, type); 5099617ba13bSMingming Cao err = ext4_journal_stop(handle); 5100ac27a0ecSDave Kleikamp if (!ret) 5101ac27a0ecSDave Kleikamp ret = err; 5102ac27a0ecSDave Kleikamp return ret; 5103ac27a0ecSDave Kleikamp } 5104ac27a0ecSDave Kleikamp 5105ac27a0ecSDave Kleikamp /* 5106ac27a0ecSDave Kleikamp * Turn on quotas during mount time - we need to find 5107ac27a0ecSDave Kleikamp * the quota file and such... 5108ac27a0ecSDave Kleikamp */ 5109617ba13bSMingming Cao static int ext4_quota_on_mount(struct super_block *sb, int type) 5110ac27a0ecSDave Kleikamp { 5111287a8095SChristoph Hellwig return dquot_quota_on_mount(sb, EXT4_SB(sb)->s_qf_names[type], 5112617ba13bSMingming Cao EXT4_SB(sb)->s_jquota_fmt, type); 5113ac27a0ecSDave Kleikamp } 5114ac27a0ecSDave Kleikamp 5115ac27a0ecSDave Kleikamp /* 5116ac27a0ecSDave Kleikamp * Standard function to be called on quota_on 5117ac27a0ecSDave Kleikamp */ 5118617ba13bSMingming Cao static int ext4_quota_on(struct super_block *sb, int type, int format_id, 5119f00c9e44SJan Kara struct path *path) 5120ac27a0ecSDave Kleikamp { 5121ac27a0ecSDave Kleikamp int err; 5122ac27a0ecSDave Kleikamp 5123ac27a0ecSDave Kleikamp if (!test_opt(sb, QUOTA)) 5124ac27a0ecSDave Kleikamp return -EINVAL; 51250623543bSJan Kara 5126ac27a0ecSDave Kleikamp /* Quotafile not on the same filesystem? */ 5127d8c9584eSAl Viro if (path->dentry->d_sb != sb) 5128ac27a0ecSDave Kleikamp return -EXDEV; 51290623543bSJan Kara /* Journaling quota? */ 51300623543bSJan Kara if (EXT4_SB(sb)->s_qf_names[type]) { 51312b2d6d01STheodore Ts'o /* Quotafile not in fs root? */ 5132f00c9e44SJan Kara if (path->dentry->d_parent != sb->s_root) 5133b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, 5134b31e1552SEric Sandeen "Quota file not on filesystem root. " 5135b31e1552SEric Sandeen "Journaled quota will not work"); 51360623543bSJan Kara } 51370623543bSJan Kara 51380623543bSJan Kara /* 51390623543bSJan Kara * When we journal data on quota file, we have to flush journal to see 51400623543bSJan Kara * all updates to the file when we bypass pagecache... 51410623543bSJan Kara */ 51420390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && 5143f00c9e44SJan Kara ext4_should_journal_data(path->dentry->d_inode)) { 51440623543bSJan Kara /* 51450623543bSJan Kara * We don't need to lock updates but journal_flush() could 51460623543bSJan Kara * otherwise be livelocked... 51470623543bSJan Kara */ 51480623543bSJan Kara jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal); 51497ffe1ea8SHidehiro Kawai err = jbd2_journal_flush(EXT4_SB(sb)->s_journal); 51500623543bSJan Kara jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal); 5151f00c9e44SJan Kara if (err) 51527ffe1ea8SHidehiro Kawai return err; 51537ffe1ea8SHidehiro Kawai } 51540623543bSJan Kara 5155f00c9e44SJan Kara return dquot_quota_on(sb, type, format_id, path); 5156ac27a0ecSDave Kleikamp } 5157ac27a0ecSDave Kleikamp 51587c319d32SAditya Kali static int ext4_quota_enable(struct super_block *sb, int type, int format_id, 51597c319d32SAditya Kali unsigned int flags) 51607c319d32SAditya Kali { 51617c319d32SAditya Kali int err; 51627c319d32SAditya Kali struct inode *qf_inode; 51637c319d32SAditya Kali unsigned long qf_inums[MAXQUOTAS] = { 51647c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 51657c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 51667c319d32SAditya Kali }; 51677c319d32SAditya Kali 51687c319d32SAditya Kali BUG_ON(!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)); 51697c319d32SAditya Kali 51707c319d32SAditya Kali if (!qf_inums[type]) 51717c319d32SAditya Kali return -EPERM; 51727c319d32SAditya Kali 51737c319d32SAditya Kali qf_inode = ext4_iget(sb, qf_inums[type]); 51747c319d32SAditya Kali if (IS_ERR(qf_inode)) { 51757c319d32SAditya Kali ext4_error(sb, "Bad quota inode # %lu", qf_inums[type]); 51767c319d32SAditya Kali return PTR_ERR(qf_inode); 51777c319d32SAditya Kali } 51787c319d32SAditya Kali 5179bcb13850SJan Kara /* Don't account quota for quota files to avoid recursion */ 5180bcb13850SJan Kara qf_inode->i_flags |= S_NOQUOTA; 51817c319d32SAditya Kali err = dquot_enable(qf_inode, type, format_id, flags); 51827c319d32SAditya Kali iput(qf_inode); 51837c319d32SAditya Kali 51847c319d32SAditya Kali return err; 51857c319d32SAditya Kali } 51867c319d32SAditya Kali 51877c319d32SAditya Kali /* Enable usage tracking for all quota types. */ 51887c319d32SAditya Kali static int ext4_enable_quotas(struct super_block *sb) 51897c319d32SAditya Kali { 51907c319d32SAditya Kali int type, err = 0; 51917c319d32SAditya Kali unsigned long qf_inums[MAXQUOTAS] = { 51927c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_usr_quota_inum), 51937c319d32SAditya Kali le32_to_cpu(EXT4_SB(sb)->s_es->s_grp_quota_inum) 51947c319d32SAditya Kali }; 51957c319d32SAditya Kali 51967c319d32SAditya Kali sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; 51977c319d32SAditya Kali for (type = 0; type < MAXQUOTAS; type++) { 51987c319d32SAditya Kali if (qf_inums[type]) { 51997c319d32SAditya Kali err = ext4_quota_enable(sb, type, QFMT_VFS_V1, 52007c319d32SAditya Kali DQUOT_USAGE_ENABLED); 52017c319d32SAditya Kali if (err) { 52027c319d32SAditya Kali ext4_warning(sb, 520372ba7450STheodore Ts'o "Failed to enable quota tracking " 520472ba7450STheodore Ts'o "(type=%d, err=%d). Please run " 520572ba7450STheodore Ts'o "e2fsck to fix.", type, err); 52067c319d32SAditya Kali return err; 52077c319d32SAditya Kali } 52087c319d32SAditya Kali } 52097c319d32SAditya Kali } 52107c319d32SAditya Kali return 0; 52117c319d32SAditya Kali } 52127c319d32SAditya Kali 52137c319d32SAditya Kali /* 52147c319d32SAditya Kali * quota_on function that is used when QUOTA feature is set. 52157c319d32SAditya Kali */ 52167c319d32SAditya Kali static int ext4_quota_on_sysfile(struct super_block *sb, int type, 52177c319d32SAditya Kali int format_id) 52187c319d32SAditya Kali { 52197c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 52207c319d32SAditya Kali return -EINVAL; 52217c319d32SAditya Kali 52227c319d32SAditya Kali /* 52237c319d32SAditya Kali * USAGE was enabled at mount time. Only need to enable LIMITS now. 52247c319d32SAditya Kali */ 52257c319d32SAditya Kali return ext4_quota_enable(sb, type, format_id, DQUOT_LIMITS_ENABLED); 52267c319d32SAditya Kali } 52277c319d32SAditya Kali 5228ca0e05e4SDmitry Monakhov static int ext4_quota_off(struct super_block *sb, int type) 5229ca0e05e4SDmitry Monakhov { 523021f97697SJan Kara struct inode *inode = sb_dqopt(sb)->files[type]; 523121f97697SJan Kara handle_t *handle; 523221f97697SJan Kara 523387009d86SDmitry Monakhov /* Force all delayed allocation blocks to be allocated. 523487009d86SDmitry Monakhov * Caller already holds s_umount sem */ 523587009d86SDmitry Monakhov if (test_opt(sb, DELALLOC)) 5236ca0e05e4SDmitry Monakhov sync_filesystem(sb); 5237ca0e05e4SDmitry Monakhov 52380b268590SAmir Goldstein if (!inode) 52390b268590SAmir Goldstein goto out; 52400b268590SAmir Goldstein 524121f97697SJan Kara /* Update modification times of quota files when userspace can 524221f97697SJan Kara * start looking at them */ 52439924a92aSTheodore Ts'o handle = ext4_journal_start(inode, EXT4_HT_QUOTA, 1); 524421f97697SJan Kara if (IS_ERR(handle)) 524521f97697SJan Kara goto out; 524621f97697SJan Kara inode->i_mtime = inode->i_ctime = CURRENT_TIME; 524721f97697SJan Kara ext4_mark_inode_dirty(handle, inode); 524821f97697SJan Kara ext4_journal_stop(handle); 524921f97697SJan Kara 525021f97697SJan Kara out: 5251ca0e05e4SDmitry Monakhov return dquot_quota_off(sb, type); 5252ca0e05e4SDmitry Monakhov } 5253ca0e05e4SDmitry Monakhov 52547c319d32SAditya Kali /* 52557c319d32SAditya Kali * quota_off function that is used when QUOTA feature is set. 52567c319d32SAditya Kali */ 52577c319d32SAditya Kali static int ext4_quota_off_sysfile(struct super_block *sb, int type) 52587c319d32SAditya Kali { 52597c319d32SAditya Kali if (!EXT4_HAS_RO_COMPAT_FEATURE(sb, EXT4_FEATURE_RO_COMPAT_QUOTA)) 52607c319d32SAditya Kali return -EINVAL; 52617c319d32SAditya Kali 52627c319d32SAditya Kali /* Disable only the limits. */ 52637c319d32SAditya Kali return dquot_disable(sb, type, DQUOT_LIMITS_ENABLED); 52647c319d32SAditya Kali } 52657c319d32SAditya Kali 5266ac27a0ecSDave Kleikamp /* Read data from quotafile - avoid pagecache and such because we cannot afford 5267ac27a0ecSDave Kleikamp * acquiring the locks... As quota files are never truncated and quota code 5268ac27a0ecSDave Kleikamp * itself serializes the operations (and no one else should touch the files) 5269ac27a0ecSDave Kleikamp * we don't have to be afraid of races */ 5270617ba13bSMingming Cao static ssize_t ext4_quota_read(struct super_block *sb, int type, char *data, 5271ac27a0ecSDave Kleikamp size_t len, loff_t off) 5272ac27a0ecSDave Kleikamp { 5273ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5274725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5275ac27a0ecSDave Kleikamp int err = 0; 5276ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5277ac27a0ecSDave Kleikamp int tocopy; 5278ac27a0ecSDave Kleikamp size_t toread; 5279ac27a0ecSDave Kleikamp struct buffer_head *bh; 5280ac27a0ecSDave Kleikamp loff_t i_size = i_size_read(inode); 5281ac27a0ecSDave Kleikamp 5282ac27a0ecSDave Kleikamp if (off > i_size) 5283ac27a0ecSDave Kleikamp return 0; 5284ac27a0ecSDave Kleikamp if (off+len > i_size) 5285ac27a0ecSDave Kleikamp len = i_size-off; 5286ac27a0ecSDave Kleikamp toread = len; 5287ac27a0ecSDave Kleikamp while (toread > 0) { 5288ac27a0ecSDave Kleikamp tocopy = sb->s_blocksize - offset < toread ? 5289ac27a0ecSDave Kleikamp sb->s_blocksize - offset : toread; 5290617ba13bSMingming Cao bh = ext4_bread(NULL, inode, blk, 0, &err); 5291ac27a0ecSDave Kleikamp if (err) 5292ac27a0ecSDave Kleikamp return err; 5293ac27a0ecSDave Kleikamp if (!bh) /* A hole? */ 5294ac27a0ecSDave Kleikamp memset(data, 0, tocopy); 5295ac27a0ecSDave Kleikamp else 5296ac27a0ecSDave Kleikamp memcpy(data, bh->b_data+offset, tocopy); 5297ac27a0ecSDave Kleikamp brelse(bh); 5298ac27a0ecSDave Kleikamp offset = 0; 5299ac27a0ecSDave Kleikamp toread -= tocopy; 5300ac27a0ecSDave Kleikamp data += tocopy; 5301ac27a0ecSDave Kleikamp blk++; 5302ac27a0ecSDave Kleikamp } 5303ac27a0ecSDave Kleikamp return len; 5304ac27a0ecSDave Kleikamp } 5305ac27a0ecSDave Kleikamp 5306ac27a0ecSDave Kleikamp /* Write to quotafile (we know the transaction is already started and has 5307ac27a0ecSDave Kleikamp * enough credits) */ 5308617ba13bSMingming Cao static ssize_t ext4_quota_write(struct super_block *sb, int type, 5309ac27a0ecSDave Kleikamp const char *data, size_t len, loff_t off) 5310ac27a0ecSDave Kleikamp { 5311ac27a0ecSDave Kleikamp struct inode *inode = sb_dqopt(sb)->files[type]; 5312725d26d3SAneesh Kumar K.V ext4_lblk_t blk = off >> EXT4_BLOCK_SIZE_BITS(sb); 5313ac27a0ecSDave Kleikamp int err = 0; 5314ac27a0ecSDave Kleikamp int offset = off & (sb->s_blocksize - 1); 5315ac27a0ecSDave Kleikamp struct buffer_head *bh; 5316ac27a0ecSDave Kleikamp handle_t *handle = journal_current_handle(); 5317ac27a0ecSDave Kleikamp 53180390131bSFrank Mayhar if (EXT4_SB(sb)->s_journal && !handle) { 5319b31e1552SEric Sandeen ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 5320b31e1552SEric Sandeen " cancelled because transaction is not started", 53219c3013e9SJan Kara (unsigned long long)off, (unsigned long long)len); 53229c3013e9SJan Kara return -EIO; 53239c3013e9SJan Kara } 532467eeb568SDmitry Monakhov /* 532567eeb568SDmitry Monakhov * Since we account only one data block in transaction credits, 532667eeb568SDmitry Monakhov * then it is impossible to cross a block boundary. 532767eeb568SDmitry Monakhov */ 532867eeb568SDmitry Monakhov if (sb->s_blocksize - offset < len) { 532967eeb568SDmitry Monakhov ext4_msg(sb, KERN_WARNING, "Quota write (off=%llu, len=%llu)" 533067eeb568SDmitry Monakhov " cancelled because not block aligned", 533167eeb568SDmitry Monakhov (unsigned long long)off, (unsigned long long)len); 533267eeb568SDmitry Monakhov return -EIO; 533367eeb568SDmitry Monakhov } 533467eeb568SDmitry Monakhov 5335617ba13bSMingming Cao bh = ext4_bread(handle, inode, blk, 1, &err); 5336ac27a0ecSDave Kleikamp if (!bh) 5337ac27a0ecSDave Kleikamp goto out; 5338617ba13bSMingming Cao err = ext4_journal_get_write_access(handle, bh); 5339ac27a0ecSDave Kleikamp if (err) { 5340ac27a0ecSDave Kleikamp brelse(bh); 5341ac27a0ecSDave Kleikamp goto out; 5342ac27a0ecSDave Kleikamp } 5343ac27a0ecSDave Kleikamp lock_buffer(bh); 534467eeb568SDmitry Monakhov memcpy(bh->b_data+offset, data, len); 5345ac27a0ecSDave Kleikamp flush_dcache_page(bh->b_page); 5346ac27a0ecSDave Kleikamp unlock_buffer(bh); 53470390131bSFrank Mayhar err = ext4_handle_dirty_metadata(handle, NULL, bh); 5348ac27a0ecSDave Kleikamp brelse(bh); 5349ac27a0ecSDave Kleikamp out: 53500b7f7cefSJan Kara if (err) 5351ac27a0ecSDave Kleikamp return err; 535267eeb568SDmitry Monakhov if (inode->i_size < off + len) { 535367eeb568SDmitry Monakhov i_size_write(inode, off + len); 5354617ba13bSMingming Cao EXT4_I(inode)->i_disksize = inode->i_size; 5355617ba13bSMingming Cao ext4_mark_inode_dirty(handle, inode); 535621f97697SJan Kara } 535767eeb568SDmitry Monakhov return len; 5358ac27a0ecSDave Kleikamp } 5359ac27a0ecSDave Kleikamp 5360ac27a0ecSDave Kleikamp #endif 5361ac27a0ecSDave Kleikamp 5362152a0836SAl Viro static struct dentry *ext4_mount(struct file_system_type *fs_type, int flags, 5363152a0836SAl Viro const char *dev_name, void *data) 5364ac27a0ecSDave Kleikamp { 5365152a0836SAl Viro return mount_bdev(fs_type, flags, dev_name, data, ext4_fill_super); 5366ac27a0ecSDave Kleikamp } 5367ac27a0ecSDave Kleikamp 536837f328ebSTheodore Ts'o #if !defined(CONFIG_EXT2_FS) && !defined(CONFIG_EXT2_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 536924b58424STheodore Ts'o static inline void register_as_ext2(void) 537024b58424STheodore Ts'o { 537124b58424STheodore Ts'o int err = register_filesystem(&ext2_fs_type); 537224b58424STheodore Ts'o if (err) 537324b58424STheodore Ts'o printk(KERN_WARNING 537424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext2 (%d)\n", err); 537524b58424STheodore Ts'o } 537624b58424STheodore Ts'o 537724b58424STheodore Ts'o static inline void unregister_as_ext2(void) 537824b58424STheodore Ts'o { 537924b58424STheodore Ts'o unregister_filesystem(&ext2_fs_type); 538024b58424STheodore Ts'o } 53812035e776STheodore Ts'o 53822035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) 53832035e776STheodore Ts'o { 53842035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT2_FEATURE_INCOMPAT_SUPP)) 53852035e776STheodore Ts'o return 0; 53862035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 53872035e776STheodore Ts'o return 1; 53882035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT2_FEATURE_RO_COMPAT_SUPP)) 53892035e776STheodore Ts'o return 0; 53902035e776STheodore Ts'o return 1; 53912035e776STheodore Ts'o } 539224b58424STheodore Ts'o #else 539324b58424STheodore Ts'o static inline void register_as_ext2(void) { } 539424b58424STheodore Ts'o static inline void unregister_as_ext2(void) { } 53952035e776STheodore Ts'o static inline int ext2_feature_set_ok(struct super_block *sb) { return 0; } 539624b58424STheodore Ts'o #endif 539724b58424STheodore Ts'o 539837f328ebSTheodore Ts'o #if !defined(CONFIG_EXT3_FS) && !defined(CONFIG_EXT3_FS_MODULE) && defined(CONFIG_EXT4_USE_FOR_EXT23) 539924b58424STheodore Ts'o static inline void register_as_ext3(void) 540024b58424STheodore Ts'o { 540124b58424STheodore Ts'o int err = register_filesystem(&ext3_fs_type); 540224b58424STheodore Ts'o if (err) 540324b58424STheodore Ts'o printk(KERN_WARNING 540424b58424STheodore Ts'o "EXT4-fs: Unable to register as ext3 (%d)\n", err); 540524b58424STheodore Ts'o } 540624b58424STheodore Ts'o 540724b58424STheodore Ts'o static inline void unregister_as_ext3(void) 540824b58424STheodore Ts'o { 540924b58424STheodore Ts'o unregister_filesystem(&ext3_fs_type); 541024b58424STheodore Ts'o } 54112035e776STheodore Ts'o 54122035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) 54132035e776STheodore Ts'o { 54142035e776STheodore Ts'o if (EXT4_HAS_INCOMPAT_FEATURE(sb, ~EXT3_FEATURE_INCOMPAT_SUPP)) 54152035e776STheodore Ts'o return 0; 54162035e776STheodore Ts'o if (!EXT4_HAS_COMPAT_FEATURE(sb, EXT4_FEATURE_COMPAT_HAS_JOURNAL)) 54172035e776STheodore Ts'o return 0; 54182035e776STheodore Ts'o if (sb->s_flags & MS_RDONLY) 54192035e776STheodore Ts'o return 1; 54202035e776STheodore Ts'o if (EXT4_HAS_RO_COMPAT_FEATURE(sb, ~EXT3_FEATURE_RO_COMPAT_SUPP)) 54212035e776STheodore Ts'o return 0; 54222035e776STheodore Ts'o return 1; 54232035e776STheodore Ts'o } 542424b58424STheodore Ts'o #else 542524b58424STheodore Ts'o static inline void register_as_ext3(void) { } 542624b58424STheodore Ts'o static inline void unregister_as_ext3(void) { } 54272035e776STheodore Ts'o static inline int ext3_feature_set_ok(struct super_block *sb) { return 0; } 542824b58424STheodore Ts'o #endif 542924b58424STheodore Ts'o 543003010a33STheodore Ts'o static struct file_system_type ext4_fs_type = { 5431ac27a0ecSDave Kleikamp .owner = THIS_MODULE, 543203010a33STheodore Ts'o .name = "ext4", 5433152a0836SAl Viro .mount = ext4_mount, 5434ac27a0ecSDave Kleikamp .kill_sb = kill_block_super, 5435ac27a0ecSDave Kleikamp .fs_flags = FS_REQUIRES_DEV, 5436ac27a0ecSDave Kleikamp }; 54377f78e035SEric W. Biederman MODULE_ALIAS_FS("ext4"); 5438ac27a0ecSDave Kleikamp 54398f021222SLukas Czerner static int __init ext4_init_feat_adverts(void) 5440857ac889SLukas Czerner { 5441857ac889SLukas Czerner struct ext4_features *ef; 5442857ac889SLukas Czerner int ret = -ENOMEM; 5443857ac889SLukas Czerner 5444857ac889SLukas Czerner ef = kzalloc(sizeof(struct ext4_features), GFP_KERNEL); 5445857ac889SLukas Czerner if (!ef) 5446857ac889SLukas Czerner goto out; 5447857ac889SLukas Czerner 5448857ac889SLukas Czerner ef->f_kobj.kset = ext4_kset; 5449857ac889SLukas Czerner init_completion(&ef->f_kobj_unregister); 5450857ac889SLukas Czerner ret = kobject_init_and_add(&ef->f_kobj, &ext4_feat_ktype, NULL, 5451857ac889SLukas Czerner "features"); 5452857ac889SLukas Czerner if (ret) { 5453857ac889SLukas Czerner kfree(ef); 5454857ac889SLukas Czerner goto out; 5455857ac889SLukas Czerner } 5456857ac889SLukas Czerner 5457857ac889SLukas Czerner ext4_feat = ef; 5458857ac889SLukas Czerner ret = 0; 5459857ac889SLukas Czerner out: 5460857ac889SLukas Czerner return ret; 5461857ac889SLukas Czerner } 5462857ac889SLukas Czerner 54638f021222SLukas Czerner static void ext4_exit_feat_adverts(void) 54648f021222SLukas Czerner { 54658f021222SLukas Czerner kobject_put(&ext4_feat->f_kobj); 54668f021222SLukas Czerner wait_for_completion(&ext4_feat->f_kobj_unregister); 54678f021222SLukas Czerner kfree(ext4_feat); 54688f021222SLukas Czerner } 54698f021222SLukas Czerner 5470e9e3bcecSEric Sandeen /* Shared across all ext4 file systems */ 5471e9e3bcecSEric Sandeen wait_queue_head_t ext4__ioend_wq[EXT4_WQ_HASH_SZ]; 5472e9e3bcecSEric Sandeen struct mutex ext4__aio_mutex[EXT4_WQ_HASH_SZ]; 5473e9e3bcecSEric Sandeen 54745dabfc78STheodore Ts'o static int __init ext4_init_fs(void) 5475ac27a0ecSDave Kleikamp { 5476e9e3bcecSEric Sandeen int i, err; 5477c9de560dSAlex Tomas 547807c0c5d8SAl Viro ext4_li_info = NULL; 547907c0c5d8SAl Viro mutex_init(&ext4_li_mtx); 548007c0c5d8SAl Viro 54819a4c8019SCarlos Maiolino /* Build-time check for flags consistency */ 548212e9b892SDmitry Monakhov ext4_check_flag_values(); 5483e9e3bcecSEric Sandeen 5484e9e3bcecSEric Sandeen for (i = 0; i < EXT4_WQ_HASH_SZ; i++) { 5485e9e3bcecSEric Sandeen mutex_init(&ext4__aio_mutex[i]); 5486e9e3bcecSEric Sandeen init_waitqueue_head(&ext4__ioend_wq[i]); 5487e9e3bcecSEric Sandeen } 5488e9e3bcecSEric Sandeen 548951865fdaSZheng Liu err = ext4_init_es(); 54906fd058f7STheodore Ts'o if (err) 54916fd058f7STheodore Ts'o return err; 549251865fdaSZheng Liu 549351865fdaSZheng Liu err = ext4_init_pageio(); 549451865fdaSZheng Liu if (err) 549551865fdaSZheng Liu goto out7; 549651865fdaSZheng Liu 54975dabfc78STheodore Ts'o err = ext4_init_system_zone(); 5498bd2d0210STheodore Ts'o if (err) 5499d44651d0SFabrice Jouhaud goto out6; 55003197ebdbSTheodore Ts'o ext4_kset = kset_create_and_add("ext4", NULL, fs_kobj); 55010e376b1eSTheodore Ts'o if (!ext4_kset) { 55020e376b1eSTheodore Ts'o err = -ENOMEM; 5503dd68314cSTheodore Ts'o goto out5; 55040e376b1eSTheodore Ts'o } 5505d44651d0SFabrice Jouhaud ext4_proc_root = proc_mkdir("fs/ext4", NULL); 5506857ac889SLukas Czerner 5507857ac889SLukas Czerner err = ext4_init_feat_adverts(); 5508dd68314cSTheodore Ts'o if (err) 5509dd68314cSTheodore Ts'o goto out4; 5510857ac889SLukas Czerner 55115dabfc78STheodore Ts'o err = ext4_init_mballoc(); 5512ac27a0ecSDave Kleikamp if (err) 55136fd058f7STheodore Ts'o goto out3; 5514c9de560dSAlex Tomas 55155dabfc78STheodore Ts'o err = ext4_init_xattr(); 5516c9de560dSAlex Tomas if (err) 5517c9de560dSAlex Tomas goto out2; 5518ac27a0ecSDave Kleikamp err = init_inodecache(); 5519ac27a0ecSDave Kleikamp if (err) 5520ac27a0ecSDave Kleikamp goto out1; 552124b58424STheodore Ts'o register_as_ext3(); 55222035e776STheodore Ts'o register_as_ext2(); 552303010a33STheodore Ts'o err = register_filesystem(&ext4_fs_type); 5524ac27a0ecSDave Kleikamp if (err) 5525ac27a0ecSDave Kleikamp goto out; 5526bfff6873SLukas Czerner 5527ac27a0ecSDave Kleikamp return 0; 5528ac27a0ecSDave Kleikamp out: 552924b58424STheodore Ts'o unregister_as_ext2(); 553024b58424STheodore Ts'o unregister_as_ext3(); 5531ac27a0ecSDave Kleikamp destroy_inodecache(); 5532ac27a0ecSDave Kleikamp out1: 55335dabfc78STheodore Ts'o ext4_exit_xattr(); 5534c9de560dSAlex Tomas out2: 55355dabfc78STheodore Ts'o ext4_exit_mballoc(); 55366fd058f7STheodore Ts'o out3: 55378f021222SLukas Czerner ext4_exit_feat_adverts(); 55386fd058f7STheodore Ts'o out4: 5539d44651d0SFabrice Jouhaud if (ext4_proc_root) 5540dd68314cSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 5541dd68314cSTheodore Ts'o kset_unregister(ext4_kset); 5542d44651d0SFabrice Jouhaud out5: 5543dd68314cSTheodore Ts'o ext4_exit_system_zone(); 5544d44651d0SFabrice Jouhaud out6: 55455dabfc78STheodore Ts'o ext4_exit_pageio(); 554651865fdaSZheng Liu out7: 554751865fdaSZheng Liu ext4_exit_es(); 554851865fdaSZheng Liu 5549ac27a0ecSDave Kleikamp return err; 5550ac27a0ecSDave Kleikamp } 5551ac27a0ecSDave Kleikamp 55525dabfc78STheodore Ts'o static void __exit ext4_exit_fs(void) 5553ac27a0ecSDave Kleikamp { 5554bfff6873SLukas Czerner ext4_destroy_lazyinit_thread(); 555524b58424STheodore Ts'o unregister_as_ext2(); 555624b58424STheodore Ts'o unregister_as_ext3(); 555703010a33STheodore Ts'o unregister_filesystem(&ext4_fs_type); 5558ac27a0ecSDave Kleikamp destroy_inodecache(); 55595dabfc78STheodore Ts'o ext4_exit_xattr(); 55605dabfc78STheodore Ts'o ext4_exit_mballoc(); 55618f021222SLukas Czerner ext4_exit_feat_adverts(); 55629f6200bbSTheodore Ts'o remove_proc_entry("fs/ext4", NULL); 55633197ebdbSTheodore Ts'o kset_unregister(ext4_kset); 55645dabfc78STheodore Ts'o ext4_exit_system_zone(); 55655dabfc78STheodore Ts'o ext4_exit_pageio(); 5566dd12ed14SEric Sandeen ext4_exit_es(); 5567ac27a0ecSDave Kleikamp } 5568ac27a0ecSDave Kleikamp 5569ac27a0ecSDave Kleikamp MODULE_AUTHOR("Remy Card, Stephen Tweedie, Andrew Morton, Andreas Dilger, Theodore Ts'o and others"); 557083982b6fSTheodore Ts'o MODULE_DESCRIPTION("Fourth Extended Filesystem"); 5571ac27a0ecSDave Kleikamp MODULE_LICENSE("GPL"); 55725dabfc78STheodore Ts'o module_init(ext4_init_fs) 55735dabfc78STheodore Ts'o module_exit(ext4_exit_fs) 5574